Pvp, coop, single player
Campaign, single scenario
Map size
Town - And heroes for those towns.
Difficulty
I will start:
Coop or single player. Preferably hot seat with a friend and a six-pack! I prefer coop since pvp pulls of the competitive devil inside me.
Single scenario, although i have played most campaigns.
Large or extra large
Tower with Neela as my main hero. Will buy Archery/Logistics/Offense specialist if i can get it early.
Dungeon - Malekith or Jeddite. I try to go for Dracageddon whenever possible.
Necropolis - Isra or Vidomina, Isra has slightly better stats.
I will sometimes play castle, rampart or inferno though. Rarely if ever stronghold or fortress. Never conflux, its easy and boring.
Always impossible difficulty setting, i like my shiny archangel ranks
To play alone again a team is a bigger challenge, you need to be carefull and better if they are not same level as you. Mostly preferer AI only, for the random effect.