I play 1 gig that requires an amp. I have to keep up with an unamplified piano, and that's about it. I have a 110 cabinet that I built for that gig, and even that's overkill. I could use a really good 10 watt head, but alas, the smallest I have is 200 watts.
My other gigs - in ears and a PA with somewhere between 2 and 20 KW of subs.
My other gigs - in ears and a PA with somewhere between 2 and 20 KW of subs.

- but that's pretty much always the case with a drummer next to me anyways.