Don't know about having a trademark fill, but there are a few I use pretty frequently.
One is just a simple 8th note snare fill but you extend the fill into the next bar by 2 notes, crash on the third note then back into the normal beat for a snare hit on the fourth. Simple but effective. Of course it's good to throw in some variation, so perhaps instead of 2 extra 8th notes I'll chuck in a triplet or 16ths.
I also like doing a triplet fill around the kit, but starting on the floor tom and working up to the snare - can be quite a tension builder.
For a fine example of really interesting quick little fills may I recommend listening to "Good Morning, Captain" by Slint. It's an unbelieveably good track and the drumming is astonishing - so natural and intuitive but full of little unexpected moments. The way the drummer (Britt Walford) uses the crash is a slice of genius too.