I am a year older than you and I am finally trying to get diagnosed. Like other people said, it depends on what you want. If you want the validation, need benefits, go for it. You may learn interesting things about yourself in the process. Like the psychologist I see sent me the diagnosis criteria and mentioned in the e-mail that I fit part of it because I do the rocking thing when I come to see him. It totally shocked me because I didn't realize that; I would have sworn that I was sitting still when I was in his office. And then there are the little things people mention on the forum that I never realized were related to Asperger's Syndrome. It's like a bunch of little epiphanies, and it has become a mini-research project of mine. If you like that process of discovery, diagnosis could be good for you. If you are like me, and kind of clueless as to how other people see you, getting a look at yourself in the eyes of the specialists during the diagnostic process could be interesting, and it can shed light on interactions you've had with other people in the past as well as the future.
On the negative side of things, depending on your health insurance (or lack thereof), there's also the waiting for appointments, possibly having to travel to see specialists, money issues, etc. to think about.
I'm looking forward to taking some tests and stuff because I think they are super fun. 