I’ve played on my Ministar Rokstar a little. One of the reasons I purchased it was a cheap/easy way to test out a P-90 sound.
It wasn’t like angels singing or anything.
In fact, the P-90 really just sounds like a Humbucker with the tone turned way down, to me. It’s not a sound that I like really much.
And when I’ve asked for other guitarists who use P-90s (in order to picture in my mind a characteristic P-90 sound), I get told: Pete Townshend (who I don’t listen to), the guitarist from Green Day (who uses enough distortion to render the difference between P-90 and humbucker mostly moot), and Lesle West of Mountain (who plays only one song I know: Mississippi Queen, which sounds mostly like a rather saturated humbucker in the neck position).
Well, after thinking about a thick single coil sound with greater saturation, and a very non-trebly sound overall, I finally thought of someone whose tone I can imagine/hear that might play a P-90: John Fogarty in his Credence Clearwater Revival days.
So I looked on wikipedia, and, sure enough: John Fogarty is listed first as artists famous for using a P-90 pickup sound.
I like his tone fine, but it wasn’t one I would spend much time pursuing. I’m glad there are people who like P-90 pickup sounds, but I’m also glad I didn’t spend $300+ to find out it wasn’t really what I wanted. Heck, I very nearly purchased a Hamer USA Special with P-90s for $550. That could have been an expensive mistake.