After watching the third season for the third time (once, when it was released, once to dub it with the german language track and once again in german with my girlfriend) I don't think it sucks at all. There are really good episodes there. Maybe because I watched it 3 or 4 episodes a day and not 1 episode a week.

And RedFive, did you ever watch the extended Version of "Razor". You should, since it has a lot more to offer. Especially the extended hybrid monologue and the fight in the first cylon war.

And for the whole series: It's more mystery than sci-fi. The "God" aspect is there from the miniseries and a major part of the plot of the entire series. So if there's some critic who says, that you can't do an series ending with "God dit it all", said critic hasn't got the point of the whole series. It's build on that topic.