Go to church with the missionaries. See what the congregation (“ward”) is like. Think about it more then.
I utterly adore my ward (and the last ward I was in was very similar, possibly better) and I can’t even tell you what a great community it has been, with instant friends for me and my baby daughter (and my husband, although being Lutheran he is a little less interested in Mormon friends)… they helped us move, they brought us dinner when my daughter was born, I’ve traded babysitting with some people, we’ve exchanged conversations and friendships and insights and advice and favors and clothes and music and books and recipes and know-how and all sorts of things… advice about doctors and schools and car repair shops and so on. I just got into a long conversation with a friend’s husband about LaTeX a couple of days ago – it was fun to find someone outside of work to bash Microsoft Word with Before I was active in this ward and the last one, I sometimes felt lonely and isolated, but I never do now.
Plus which (I know this should be the primary consideration, but hey, I’m a heretic) I think I am a better person when I attend church. It helps me deal with things like my propensity towards judgmentalism and the anger I sometimes feel towards people, and it helps me to get my priorities straight and to be a more loving person. And it helps me a lot in dealing with my family, both my parents and my husband/child, and trying not to get frustrated or angry when dealing with (particularly) my parents.
My husband’s Lutheran community is nice, and there are a couple of people we are good friends with, and I like the intellectual atmosphere very much more, but as an overall community and for internalizing important spiritual lessons it is just not at the same level of awesomeness, or even same order of magnitude, as my ward.
Now, be aware that there are a host of intellectual problems it is possible to have with Mormonism. Rhodes and TokyoPlayer touched on a number of them in your other thread. Of course, any church will have its share, I suspect – Mormonism is a little easier to pick on because we’re talking about things that happened 200 years ago as opposed to (e.g. for mainstream Christianity) 2000. That’s something you will have to figure out yourself if you want to deal with it (for example, see some of the links they posted in your other thread). I made the decision that the things I mentioned above were more important; others have made different decisions; and others still have come to different conclusions.
But again, I’d go to church a couple of times with the missionaries first anyway – if you get a terrible vibe and hate it (the ward I grew up in, well, they were nice people, but I never did click with them) and/or decide Mormonism is not for you, well, then, there’s no more to say, and if you absolutely love it, then we can start talking about the rest of it.