I currently have GHS boomers on my electric. I've tried Pyramid and Ernie Ball Slinky before, but I like the tone that the boomers is giving me. Its super twangy to my ears but not too bright, somewhere in the middle. But I still have yet to try more brands of strings.
For acoustic, I have a set of Dean Markley Helix HD. The feel of the strings was somewhat smoother, but if you tend to play the whole fretboard, there'll be times when you feel slight burn on your fingers. But I still got to give credit on the super bright tone. The strings also gives a more resonant tone. After couple of weeks first attached to the guitar, the strings still felt as though it was brand new, and the fresh tone was still there.