I switch a lot depending on guitar and how I feel (I switch gauges too).
I like the RIPS Balls (with brass or what around the ball ends), they give some more meat to the plain strings. Also hold up longer.
I like GHS because they're bright and cheap.
I like DR Tites, because they feel great, but IMO they loose brilliance rather quickly.
I love Pyramid, because they're German, they're cheap and the sound and play good.
I like SIT because they are great quality and sound/feel great, hold up well too.
I switch back and forth depending on guitar and how wimsy I am finger wise:
9-42
9-46
9.5-44
10-46