I like the coda flats on my cyclocross bike with Ritchey shorty bar ends, but recently I've taken to riding a beat up old 10 speed most of the time, and my favorite thing about it besides the big wire baskets in back is the drops. I find I spend most of my time in the drops. Mtn style bars are good, but you might find you miss the drop position.

My fixed build I'm currently working on is getting drops for now because that's what I have, but I might switch to a flat bar or bullhorns later. I'm thinking bullhorns will give me the best advantage while climbing which I do a lot of. I don't like risers either, but flat bars are a nice ride for me.