I really like the links at the top for "Show unread posts since last visit." and "Show new replies to your posts." I like the consolidated build thread forum and the vendor review forum. Those have been asked for many, many times in the past at "other" places I frequent.
I don't know about the rest of you guys, but after you spend some time on a forum, you get to know people and their personalities just like you would if you hung out at work, the gym or church. Sometimes you know them even better than some of your more "normal" yet superficial relationships. Having a place (and relatively private - password protected) to have normal everyday discussions, such as the traditional taboo sex, politics, and religion topics, just like you would with friends at the bar, is a nice feature. And along those lines, one of the things I enjoy is genuine discourse, not just everybody spouting the same opinion, but getting to know and understand other contrasting opinions. (Because you really have to understand the how and why somebody thinks something in order to clearly articulate to them how and why they are wrong.)
The coolest thing though, is that this is like going to a reunion and meeting up with people you lost touch with and didn't really know how to get ahold of. There is a comforatable familiarity with all the names here.