ZOMBIELAND: they're dead and Woody's loving it

Ruben Fleischer's directorial debut is a reasonably satisfying blend of "Shaun of the Dead" and "Dawn of the Dead" with a smidgin of John Hughes-esque coming of age angst thrown in for good measure.
ZOMBIELAND's rather thin storyline isn't going to win any wards for originality but it is fun in a very undemanding kind of way. Jesse Eisenberg plays Columbus, a geeky, virginal, neurotic loner in his early 20s whose hermit-like existence has contributed to his surviving a virus which has turned the human race into flesh eating zombies.
Fate throws him together with Tallahassee (Woody Harrelson), a gun-totin' "bring 'em on" kind of tough guy who just loves killing the undead. Heading east from California they team up with a couple of crafty sisters, Witchita (Emma Stone) and the younger Little Rock (Abigail Breslin). The presence of female company - and Witchita in particular - gives Columbus a belated opportunity to discover his inner hero and start acting like a man.
It's something Eisenberg should be a pro at by now, having already experienced this particular rite of passage in "Adventureland." I'm not sure if there's any significance in this but theme parks provide the backdrop for his transition from boy to man in both films, although in the former he has the luxury of wrestling solely with his own insecurities uninterrupted by the living dead.
Part horror, part roadtrip and mostly comedy, the film's weak point is it's lack of focus. There's too many sub themes and subplots (Harrelson's quest for a Twinkie, for example) which kill some time but don't really go anywhere worthwhile. There's a sense of certain lines being spoken and certain events taking place solely to provide a quick laugh rather than develop the storyline. The film's biggest "what-was-that-all-about?" moment comes when the gang encounters a real life movie star, playing himself, hiding out in his palatial Beverly Hills mansion. 
For me the biggest downside to ZOMBIELAND is Woody Harrelson. I just don't like looking at him or listening to him. His thin high pitched voice and the way his jaw makes his lower lip stick out further than his upper lip makes me feel somehow unclean. 
Irrational I know but I can't help it and I've just got to learn to live with it.