Whether you realize it or not, for those of us who rely more on original characters than already-existing ones, there tend to be certain recurring elements that are almost like a "signature".
For instance, with many of my characters, if they're skilled with various languages, at least one of those languages will be Mayan (sort of as a tribute to the Man of Bronze, Clark Savage Jr.)
Also, recently, my gaming group has been doing a setting where the characters are all Girl Genius-style Sparks (or like Forge from X-Men, whichever is easier to comprehend). As such, most of them have the Gadgets power, and we all have a tendency to include about 3-4 "frequently-used" Gadgets with our characters.
But these are just a couple of mine. How about yours?