I hate growing a 'tache. Its so uncomfortable. I always make sure to shave it as close to the skin as possible.
I have a beard though, I trim it into a little goatee 'devil beard'. The tache though just isn't happening. I've gone without shaving for a while before and grown hair in that general area, felt absolutely awful when tanning a bomb, and it made it a nuisance to make a proper airtight seal if using a big bong, rather than the narrow neck of a plastic coke bottle, etc.
Whilst the right moustache might look good on me, it just isn't fucking well happening.