I use romain plus whatever leafy greens are in season, spinach, and
loose leaf lettuces, like redleaf and bibb, I use various cabbages
as well, I especially enjoy bok choy. I like escarole too. If I see
piles at the produce section I'll ask if I can have the beet tops that
uneducated palates tear off for the trash. The produce manager is
happy to give me beet greens for free, otherwise they'd sinfully go in
the dumpster... the idiots don't know that beet tops are precicely the
same as swiss chard. I'll eat iceberg too but I prefer the dark
greens. I don't always use greens for salads, I use them in soups
too.