It's weird, I actually found my fixie easier to ride than my geared bike. Maybe it's because it's a bit smaller and more comfortable, but I think having only one gear and having to spin all the time makes your legs work more efficiently.

Speaking of riding out of the saddle, is it particularly difficult on a fix? I haven't tried it yet, maybe because I'm too scared of flipping myself off with the steep-a$$ headtube.