i posted here a while back but while i'm at it i would like to mention that in automate stockfish hangs a lot of pieces. I also started playing bughouse more so bughouse takes the cake for favorite for me
What is the BEST variant??

IMHO the best among popular chess variants are in this order: 1.) Standard Chess 2.) Chess960 3.) King of the Hill 4.) Capablanca Random Chess (just amazing) 5.) Gothic Chess 6.) Crazyhouse 7.) McCooey's Hexagonal Chess 8.) Shafran's Hexagonal Chess. Yes, we can have a lot of fun playing chess variants. However, some FMs and GMs believe that playing some of these variant could be actually, harmful for our Standard Chess skills. I am going to ask them publicly about their opinion on this topic.
King of the Hill because it is played closest to normal chess (at least if you play it well - the four center squares are magnets for suicidal kings but only relevant late in the game for people playing well. Easy win with solid Black play against a suicidal White king is 1 d3 d4 2 Kd2 e4 3 Ke3????? Qg5+ 4 Kf3 Qg4+ 5 Ke3 Qf4#.
After that, Horde is decent though I seem to get the White pieces a bit more than the Black pieces (seems like even chances for both sides with decent play and crushes for either side not playing well).
that is literally a thing people don't want in a chess variant. why play variants? a different feel from normal chess. this goes against that
people play variants because they think it's more fun than normal chess.
for example, chess960, doesn't involve a lot of memorization of lines and what to play because the pieces are random.
maybe they aren't really good at chess, but somehow realize, that they're good at atomic chess.