This has probably already been done, but I just wanted to know what type of mission everyone hates the most.
So, for those that have forgotten, I'm speaking purely of the 11 campaign missions for each colony (I do not consider the first mission a true mission, because if you manage to fail that you really fail.)
Colony Building - Most missions. Get population, mine things, research. E2,3,5,8,10,12 | P2,3,5,8,11,12
Wreckage Gathering - Raid crash sites teeming with enemies and gather wreckage. I consider Eden 4 under this. E/P4,6,8
Mining Outpost - Sit in the middle of bloody nowhere being attacked from every direction and gather resources. Plymouth is allowed to research, too. E/P7
Colony Raiding - Pwn an enemy colony with whatever units you happen to be given. E11 | P10
Personally, I think colony raiding is the hardest but also the most fun. P10 has always been a pain in the arse for me. Wreckage gathering, on the other hand, is boring to me. Mostly just driving around picking off small squads and trying not to get swamped in the end.