Always Pro-Mark oak, for as far back as I can remember, which was when Rock Knockers first came out ('71, '72 ?).
Since then have used Rock Knockers, sometimes with a nylon-tip 5A when I wanted to do some delicate cymbal work.
I still sometimes use Rock Knockers, although I have been trying different weights lately. Mostly wood- but sometimes nylon-tip 2B's, and both wood- and nylon-tip 5A's and 5B's.
I also have a few pairs from a "Stick Brick" I bought at GC a few years ago; I think they're around a 2B. I don't know what wood they're made of, but it's incredibly tough. I'm only on about the second pair of those and I bought them 6 or 7 years ago.
I also have some Vic Firth brushes, and some hard cymbal mallets (I don't remember the brand) that I use for cymbal "swells" and stuff like that.
And while somewhat OT, there's something else I have in my stick bag: it's a glow-in-the-dark velcro band that I bought at a bicycle shop. Cyclists use them to keep the cuffs of their pants from getting caught in the sprocket and chain; I use them to keep my bass drum beater from getting caught in my pant's leg...