I think its more fun because I'm answering more questions now than I used to. I used to only visit GAG to answer messages from friends and occasionally answer questions (but not a lot ). But ever since they changed I've been on here more, asking more questions and especially answering more questions. I also like all the extra categories.
I'm not sure exactly what you mean by this question, but I joined 3 days ago and I love it! If it is wasted opportunity, then I probably won't be around much longer, if there is more depth I will probably be a long term user, I guess only time will tell. I usually don't like wasting time, but that doesn't mean I haven't or don't. I'm hooked for now and we'll see what I really think of it in the future.