I liked the first ep. as well, it could have been better and I hope it will when the characters develop more over time. It could still go both ways, if they make Barry too serious of a character I expect to get bored of the show quickly as I the reason why the Flash is one of my fav. super heroes is because of his relaxed attitude and humour.
The thing that bothered me the most was the shows logo as it differs so much from the comic logo.