Interesting topic, I'd be curious to see some ages to correlate with some of the posts here. I really feel that this is a highschool type of topic and that, for me at least, this hasn't mattered for a long time. I'm 28 and the last time I worried about what someone else thinks of what I do to enjoy myself during my freetime was long long ago.
Unless someone is paying me for my time, their opinion of what I do with it is completely irrelevant.
Now, from a personal perspective, I am a little bit proud that for the most part my hobbies are "nerdy". I'm glad that I'm not some cookie cutter Joe Blow. I don't want to be random_Person_20011 88228419741.
Lastly, there's a distinction that I think should be made here. I am a person that knows full well the stereotypes that are associated with nerds. I don't smell bad, I don't dress funny, I talk like a normal person, and I have interests outside of the nerdy spectrum. Those that are either too far into the abyss, or just don't have the social awareness to realize there is an abyss are the ones that perpetuate the stereotype.