So funny story. I broke @PaladinGP 's old winstreak record today with 32 wins. Then I played a Co-op game. Our team won. That was nice. AND THEN I FORGOT TO SWITCH MY PARTY BACK AND WENT INTO A MP GAME WITH ONE CHARACTER AND OF COURSE PROCEEDED TO RUIN EVERYTHING OMG ARGHHHHHHHHHHHHH ahem. well then. that happened today. So anyway... I think there should probably be a warning before queuing MP with less than 3 characters. Or a little icon that shows the character icons for your active MP roster in the MP lobby. Or both. Or maybe queuing in regular MP should simply require 3 characters. To keep this from ever happening to any poor unfortunate Cardhunter ever again.
http://forums.cardhunter.com/threads/suggestion-active-party-indication-near-the-mp-keep.5982/ lets see if an active party indicator / dialogue gets more attention, now that such an outstanding presence in cardhunter spoke out for it. Surely we are obligated to make his playgrounds comfy.
I think it should be possible to enter a ranked game with less than 3 characters, but a warning would be nice.