And then I measured them. Not geeky at all, right? ;-)
I normally use a size 7 crewel/embroidery needle. It just feels right for the work I do. It has a nice length and the head has the right size for the number of strands I use. I mostly work with 2 strands of floss, but obviously, if I work on a project where I use more - or a different type of thread - I would use a needle that was appropriate for that.
What kind of needles do you use? What size do you use? Do you swear by a particular brand?