Its like choosing mother or wife, you know?
You need one each. What the heck - gimme 5 each! I'll give this poll a pass...
I use them both and like them equally. I'd use singlecoils for milder music genres, but also for stoner metal and stuff of that sort. Humbuckers I'd use for heavier music styles. I used to use humbuckers for everything, but I discovered that I really love the singlecoil sound for some applications. In short, I use them both depending on situation. Will give this poll a pass.
But for cleans and bluesy gain, it would be the single coils.
if theres any reason why single coil sounds coming out while humbucker hide playing, imho, its more of the differences in frequency spectrum which the 2 occupied and how our individual hearing able to react more to higher frequency sound(single coil) then lower ones , not forgetting the psychological aspect of listening to the sound of guitar, according to individual preferences and exposure to the music we like.