On my fretted basses, I use DR Marcus Miller Fat Beams for long-lasting growly tone and nice feel. I use GHS Bright Flats on the fretless and may never change them.

For electric guitar, I've used D'Addario 10s and currently have GHS Boomers (10s) on the strat. The Boomers were free. I think I'd like to go back to 9's on the strat though and may use webstrings.

For the acoustic, I use D'Addario Phosphor Bronze Ultralights.