My political biases aside, this debate had Romney looking petulant, even desperate at times, always complaining and arguing with the moderator over having the last word and the rules, even segueing completely and totally off-topic as he tried to take opportunistic potshots at Obama. For his part, the president was fairly laid back and nonchalant by comparison, resulting in a contrast that made the former look even worse.
As a summary, Obama definitely took the debate, stylistically and pointwise. He brought his A game, played for keeps, challenged Romney and outright called him on his more dubious claims as he should've the first time, and it showed. As with the Biden debate, only Republican leaners can hope to call this a draw with any sort of conviction via confirmation bias. This wasn't as visceral a win as Romney's initial success, but in this case, it wasn't about Romney losing and fielding a weak performance; he certainly tried, he gave it his best; it was about Obama winning, channelling his inner fire and being at the top of his game.