Y'know what I'd really love? A way to have a list of favorite topics, easily accessible, probably with a single click from the main page.
Right now, the "Show new replies to your posts" is fantastic, and I use the hell outta that, but I've noticed it's buggy, and sometimes won't show a thread that has been posted in, and shows ALL threads you've posted in, even and especially what might be days after you post in it, and then lose interest. I know there's been a few from the Players Wanted that have dragged out for dozens of posts over a few weeks. It also doesn't let you save treads you want to read, but don't post in.
I know you can do topic notification, but that seems buggy, as well. Even though I've told it to not send me emails, it does, anyway... and usually for ones I didn't even mean, or remember, asking it to notify me on. Also, it's hard to get to, so not nearly as useful, although it may be more useful than I think; I haven't really messed with it too much.
Anyway, I tend to ramble, but the basic gist is that I'd like some way to mark a topic, and then have a nice, concise list of them in one easy-to-reach place, including if it's updated or not.