I really don't give this much thought. I've said it before but people don't seem to believe me, but I really don't care what people think of me. In fact, it's a point of contention between myself and my friends because I will do something they perceive as embarrassing and not care, but they will care because they think it affects their social standing.
In this respect I am the same way. I try not to be offensive towards others but I really don't give a crap what anyone thinks of me or my actions or opinions as long as I'm not harming anyone. And I think this affects how others view my nerdiness, that whereas I have a few what might be called "nerdy interests" no-one calls me nerdy. (Except my wife and kids.)
Have you gotten more or less nerdy with time/age?
When I was a kid the term Geek was never used. Brainiac, and later, when I was a teen, the term Nerd was. But I never considered myself a Nerd because whereas I liked science and technology and other Nerd subjects I also played ball and tracked animals and fished and was outdoors a lot and did other non-Nerd stuff.
Back then it was either/or, either you were a Nerd or a Jock or Popular or so forth.
That was never really true,
and it certainly isn't anymore, thankfully, but at that time that was the way a lot of folks viewed it.
But because of that I don't think of Nerd as a classification of the way a person is, but rather more a set of traits they can exhibit under certain circumstances, whereas in other situations they may exhibit no Nerd traits. So I'd agree with most of the other commentators in that respect.
That being said I'd have to say that with age some of my Nerd traits have become stronger and more evident, many others have practically disappeared. I am though definitely far more of a Nerd than a Geek.