Reason #1: Tradition 
Don’t underestimate the utility of family tradition. Watching General Conference is about as exciting to kids as… watching General Conference but that doesn’t mean the experience is without value. The kids are watching you, parents, to see how into this Church thing you really are. Feigning indifference (or really being indifferent) towards General Conference is not going to do your youngsters any favors. Do you really think they’ll turn out more interested in the Church than you? At least by watching General Conference as a family you’re laying a foundation for them, giving them a spiritual context which they can later reject if they choose — but if you never watch Conference then I guarantee you that your kids won’t either. Does that sound like a guilt trip? Welcome to parenthood. But think about those times when you watched General Conference as a kid with your family. Maybe you went to the Tabernacle; maybe you went to the Stake Center. But were those all a waste of time for you? I doubt it.
Now, if you don’t have kids, knock yourself out I suppose. But think perhaps of your own parents and what they would want you to do. Watching General Conference might be a nice thing to do to show some respect for the way they tried to raise you. Unless they didn’t do that sort of thing at all; in that case, watch General Conference just to stick some mud in their eye.
Reason #2: Living Scriptures 
I’ll be the first to admit this is a bit of a stretch. As a missionary I glued some talks into my scriptures, thus reinforcing my belief that General Conference was the living manifestation of the open canon. It’s been a while since the canon was enlarged in a General Conference session (though some might argue otherwise, unpersuasively). More likely we’ll hear leaders of our Church speak to present-day issues and attempt to apply the scriptures to us. We may hear some new parables or interpretations of latter-day events. But new scriptures? Unlikely. STILL — for you long-shot bettors this is a semi-annual finger-crossing moment. Will this be the big one where it’s announced that women finally will be ordained to the Priesthood? Yes it is, as a matter of fact. But I have bad news for you. 
Reason #3: Laugh them to scorn
If the BCC liveblog open threads are any indicator, there are hundreds of you out there just watching General Conference in order to get upset about stupid stuff. The choir went up an eighth AGAIN!  Hmmm, he looks like he’s really sick and will die soon . I can’t believe they’re speaking out in favor of traditional marriage!  Gang, you could be right about each and every one of those whiny complaints, but you’d still be wrong. Watching General Conference to complain about it is like reading Playboy for the articles. Still, if I had my druthers, I’d rather have people watch General Conference and whine about it than not watch it at all . There’s the chance that something good will sink into your cold, flinty hearts after all.
Reason #4: Hanging on
This is why I watch, really. I feel like I’m hanging onto the Church by a thread and I desperately want to love it and for it to love me too . So I watch General Conference for that one moment where I feel like the speaker is talking right to me, right to what I love and to what I fear. It means everything in the world and it’s happened every time I’ve watched General Conference.  In other words, General Conference is a chance for me to get what I crave but rarely get out of my weekly  churchgoing experience – a sliver of the Spirit and a sense of renewal. If you’re feeling desperate about your Church situation and you wonder if there’s anything left for you at all, General Conference might do the trick. 
Reason #5: Community
Think of all those officemates smirking, smiling, lips curling insidiously as they talk about the Breaking Bad finale. Grrr, you swine!  I didn’t watch it! Well that’s what’s going to happen if you don’t watch General Conference – everyone will be talking about it and you will feel like an outcast, a leper, because you didn’t watch and you have no idea what that new 70 from Colombia said or the wackadoo analogy to gay marriage that someone else used. Okay, I admit that’s a pretty weak sauce reason to watch General Conference, especially since during the next six months you’re going to be bombarded every week with talks that are based on the General Conference addresses — heck, not watching might be the only way for your weekly Sacrament Meetings to preserve any novelty. But consider the community aspect of a gathering of the Saints. We all sit together to listen to our leaders, to be edified, to pray together  and sing together. Consider that millions of your fellow Mormons are bowing their heads  at the same time you are. That’s worth something, isn’t it?
So that’s the top 5 reasons I could think of to watch General Conference. None of them are dead-lock compelling, so if this was the weekend you were going to go ziplining in Costa Rica I don’t think you should change your plans. But if this was the weekend you were headed to Peppermill, yeah maybe you should change your plans. In terms of what session is most important, there are various theories. Until this year the Priesthood session always held some secrecy and forbidden nature so you’d think that would be the one to watch — only you’d be wrong, because nothing monumental has ever happened in a Priesthood session . Others think that Sunday Afternoon is the one to watch because that the closing, the climax of the whole shebang, except they’re wrong too. Roughly 15 minutes of the Sunday Afternoon session is taken up thanking people for the stuff they said earlier. No, if you want the revelatory action I’m afraid Saturday is the day for you. Sept. 30, 1978 was a Saturday. Anyways, good luck to you and pick the right session. Saturday is the day for experimental choirs, so that might be nice.
 see, e.g. http://www.youtube.com/watch?v=gRdfX7ut8gw
 see, e.g., http://www.youtube.com/watch?v=iJTY8nHay_k barfffff.
 they’re being ordained to the Aaronic Priesthood.
 Apologies. Couldn’t resist.
 They’re all old! They’re all going to die soon! Get over it.
 C’mon, what else did you expect.
 It’s a close call though.
 Cue some schmaltzy song I suppose, but it’s fairly true.
 Especially Richard G. Scott LazerVision ™.
 OK, maybe not weekly.
 Or it might finish the job and give you the resolve to leave for good. Either way.
 Intentionally Omitted Out of Superstition.
 see, e.g., http://www.victorianweb.org/authors/rb/cloister.html
 When they’re praying, are you supposed to close your eyes? I mean, it’s on TV. But yeah, you should probably pay attention at least.
 Seriously you’re supposed to pray along with them too. Just roll with it.
 Prove me wrong, WVS!
 But April 7, 1844 and June 16, 1844 were both Sundays, so I don’t know what to think anymore.