I think it all depends on my mood. Most importantly though, is what type of game can you find? Most of the Demo rooms are always full and I don't remember the last time an escort or extraction room had anyone in it. I think I have played one escort game in the 5 months I've had the game, I wish more people would play them. As was said before those types of games are the most enjoyable, where teamwork and communication is required.
I would have to disagree about Suppression turning into a campfest, I think Demo turns into the biggest campfest there is. Once one side gets a game or two ahead, all you hear in the mic is "Let's get the bomb and camp with it."

Only when the side with the bomb is up 4 or 5 people will they even try to plant.