In
Dexter's laboratory lives the smartest boy you've ever seen! But
Didi blows his experiments to smithereens!
Haha, sorry. 90s moment!
Anyway, I like
Dexter. I think it's a slightly nerdy name, but I like nerds and don't think that's a bad thing. There's also a fairly popular show centered around a character named
Dexter, called, I believe.
Dexter.
I would not use it because it isn't really my style, and I know my siblings would make
Dexter's Lab references all the time, made worse by the fact that I'm a scientist. All in all, I would say it is definitely usable.