Um, I suppose, yeah. The guy I'm currently with. He and I are almost exactly alike, as far as personality goes.
It actually isnt a good thing, simply because we're so alike it causes a lot of controversy. We're both stubborn, hard-headed, and argumentative. So, if we fight. we FIGHT. and neither of us wants to give it up.
As far as dating goes... I'd recommend someone not too different from you, but also not someone exactly like you. Try to kinda... dive into that bleak grey area...