The problem with Arsenal fans is division, some are anti-Wenger to the extreme, the AKB crowd can be as ridiculous at the other extreme. This just makes us a laughing stock as it looks like with every match we change our minds about whether we hate or love him. We do (and I do too) complain about finances way too much, but put any other clubs fans in our position and they'd be of the same opinion.
In real life United fans are head and shoulders above everyone else on the arrogance scale. Apart from one of my closest friends, every United fan I know has basically stopped watching and denounced their support this season. Now they are struggling a little they're all jumping ship, pathetic.
The Chelsea fans that Zurich mentions I've never come into contact so can't comment on them really. Far too many Chelsea fans in Essex though and one of my school friends switched from West Ham to Chelsea in 2004 which he gets ripped for.
Liverpool fans on TSR I find a lot worse than in real life (Luke and Zerf being exceptions). Every Liverpool fan I know IRL is pretty decent.
Don't think I know any City fans, and only one Spurs fan IRL.