I seem to gravitate toward pickups with alnico 2 magnets, as I'm just fond of lower-output humbuckers. I just really like warm-sounding pickups, but other than that, no. I don't care what type of metal the bridge is made out of, whether there's a big brass block on the trem, etc. etc. And as far as how the actual electronics all work, with caps and transistors and whatnot, I'm clueless. I always swap out my own pickups, and have for years, but I do it by looking at diagrams, and not because I have any clue what's going on. For me, it's as much about the feel of the neck and how it balances on a strap than anything else. I just want it to be comfortable to play. Everything else, even the tone to be honest, is secondary for me.