I think I like them because they are so devious that it almost becomes a mark of honesty. My favorite of course is the spy clothier Garak, who I'd like to think exemplifies the best qualities in C-society. They almost seem to be in the same position as the klingons were in TOS.
The first time i heard about cardassians was when i was a kid and got a box of Star Trek Micro Machines, i went by the Borg cube and romulan warbird and grabbed the Galor class cruiser.... i still love that thing...
I had a Cardassian tac officer but I ended up deleting him and going with a Tellarite as my Tac officer. My main is a Science Vulcan and my Engineer will be joined trill (if the TOS uniforms ever get fixed)
If they do a Cardassian faction, I'll try to make a char there (although they will def need to make additional character slots for me to do so)
I do have a Cardassian BOFF on my Vulcan and will probably add Cardassian BOFFs to my other characters. Cardassians are one of my favorite races, I must admit. They look pretty cool.
Depends on the Cardasian. Some (like Garak) are really cool. Others (like Gul Ducat or some of the ones during the Occupation of Bajor) not so much. It just depends on what the individual Cardasian is like in my oppinion.