I did not like the burn nerf - where the fire made the mobs "scared" and scatter, despite taunting. I understood why it was done, and can even see their point, but I still didn't like it. When they "nerfed" the first nerf, I was very happy.
I didn't like the missions with simultaneous clicks - was glad they fixed most of those.
I didn't like CoV. A dark, creepy place. I thought they should have just made villains and set them loose on hero side. The reasons I didn't like CoV - it drew players away from CoH and the zones were creepy! Not that I teamed that much - I can be a bit moody. Wanting to team some days, wanting to /ghide on others. But, for Maria Jenkins arcs and whatnot, I recall there being a lot off villain players online so I couldn't get up a team to do the AVs. It's part of the reason I got a second account - one character to do the tanking, the other to do the damage. (or buffing, while one does damage)
And honestly, there were some amazing times in Siren's call pre-issue 13. It was a blast, and it was a darn shame that it couldn't like that again. Post i-13, I don't think I ever saw more than 10 characters in zone at one time. Just a shame. It was one of the best new zones - a lot of us, even those of us that weren't all about pvp. I mean, I could not care less about pvp. But, because there were toxic tarantulas, @sinala and myself, we'd go in there and kill them for the badge. She was an emp, gave me clear mind, so I could always see the stalkers. Freeze Ray, bitter freeze ray and then Bitter Ice blast, ice blast, dead. Occasionally, ice patch would help out, too.
Sometimes, they'd gang up on us. Darn masterminds and their lieutenants! I'd try to get the MM in my sights, but those rascals, some of them wouldn't even be in sight! Drove me crazy, but it was fun. If I knew then what I knew now, I'd have made a bind to target them somehow....lol.
I also loved the ski slopes. Very fun stuff.
I would have never trick-or-treated if there weren't badges involved. It was fun the first couple of times, but after that, it got old. Nobody put a gun to my head, but you know, the pursuit of things shiny is why I played.