Thoughts on twitter so far

I'm all for finding new avenues to connect with those who share my passions, but I'm not fully on board with Twitter just yet. I understand the site is meant to be more professional but it almost seems cold. Facebook and Myspace profiles can get a little too intimate if you ask me. No one needs to know what you are doing every hour via status updates or see pictures of your drunken weekends. Yet Twitter has chopped away at the basic structure of social networking so much that it's difficult to know who anyone really is.
I have a hard time deciding who is worth following or who I should allow to follow me by reading a 150 word bio about them. In my "about me" section I barley had room to state I was a student and list my major. It makes me feel like I have nothing to offer in the eyes of Twitter users, yet I continue to get random users asking to follow me. Whether this is based on my thumbnail picture or thumbnail's worth of information I don't know. Either way it seems questionable and contrived.
Twitter certainly has some positive aspects. For example, I am following the San Diego State University news team (a grad school I've applied to,) and by looking at who else was following them I was able to locate some current students to talk with. Still, I could have done the same thing on Facebook.
I don't know, maybe I'm missing something. It just seems like a "6 degrees of separation" research project.

I'm wondering what other class members who are new to Twitter feel about the site. Anyone have any different thoughts or have tips for me on using the Web site to its full potential?