Personally I like the small maps. I am one of those people who will always vote for maps like Braundorf, Adlernest, Special Delivery or Erdenberg regardless of numbers. I enjoy the constant action, not necessarily the spam fest so much but it is a price I'm willing to pay for a fun game.
I dislike maps where most of your time is wasted running to the objective. On bigger maps you will find yourself running to the objective for a minute, then find the first enemy and die. I find this boring.