I play bullet, so my chess isn't the best, but that also means you might get dirty flagged.
As black I play the Sicilian against 1.e4 and the Nimzo against 1.d4. As white I flip flop between the Italian and queen's gambit.
I've played quite a few games in the Najdorf, giuocco piano, triangle-Slav and Catalan setups. That doesn't mean I play them well, but I've seen some things.
Some day I plan on exploring the Spanish and the Berlin with both colors.