Santino, albeit providing some funny moments, didn't really have a good title reign. It was just a comedic segment of the show rather than a true holding. Beer Money, while they've been pretty solid, they've never been able to capture my attention and I have to disagree with the "James Storm could be world champion" people. He seems like he wouldn't even be a successful upper midcarder to me. Roode has potential, but not for a while.
Joe's reign was a bore. I'm not a fan of TNA and I don't watch it that often (and when I do, I usually can't last a full episode), but I don't think a single thing Joe did that I saw/read/etc was interesting. While Kong's championship run was better, I think, it just never captured my attention either. Maybe its because she lost it and regained it a few times and nothing really has seemed to change? Idk.
Punk's WHC reign to me was just a typical transition period. Nothing big.
HHH's title reign, I hated. He held it way too long for no good reasons. Its not like he was putting on 5-star classic matches with it. The only interest anybody had in his reign was "when is Hardy going to win the title?" which ended up being "he never will unless he can pin someone else, not HHH" lol.
McGuinness...I don't know. I don't know damn near anything about ROH. If I haven't heard about it, I obviously don't care enough about it haha.
So that leaves us with two choices: Orton or Miz/Morrison or Orton (and I'm assuming its not his 20 minute long reign, right? Lol).
Orton gets points for having retained at WrestleMania. That was a big shocker. But he loses almost all of them by dropping it a month later at Backlash. His feud with Hardy at the beginning of the year was pretty good, as was his feud with HBK around Survivor Series. / Miz and Morrison get major points for being totally random and actually pulling it off. Everyone was shocked that they beat Hardy and MVP because these two were feuding at the time as well. When they announced the match on Smackdown, I figured both sides would just cave in and the match would be called with Hardy/MVP retaining, nothing big, you know? I was TOTALLY shocked when they won, and then when they retained a few minutes later on. And then they went on to become easily the best tag team out there today, having a really long and successful stride. They didn't even lose their titles by getting pinned. That gives them an edge over Orton.
So Morrison/Miz have a longer reign (I think), and they didn't get pinned, and it was a shocker that they won in the first place, on top of how much they improved over that time period and kept it interesting for all of us. Orton, though, faced much tougher opponents.
This is tough....so I'm not going to vote until I see some other opinions trying to sway me one way or the other, but rest assured, I'll be voting for either Orton or Miz/Morrison.