As far as seasonal beers go, I'm not a fan of "spiced" beers. The "winter warmer" genre of beers (generally strong, dark beers, but usually without the nutmeg or whatever thrown in) can be tasty though, you might give some of those a try if you like dark, malty beers and don't mind a bit more alcohol.
As for IPAs, well made ones can be excellent, the crap ones are crap, same as with any other style. No worries if you don't like bitter beer though, that's why they make different kinds of beers. Sounds like you might prefer British Pale Ales and IPAs, which are generally less hoppy/bitter (and more traditional) than US varieties.
I'm not crazy about Bud Lite etc. as far as taste goes (when "lite" beer was introduced in the mid-70s, the brewers generally hated making it and didn't consider it to be beer because of the taste). But it certainly has its place: it's dirt cheap, you can drink a ton of it without feeling full, and the combo of super-light body and super-high carbonation makes it feel more refreshing than a traditional beer on a hot day.
Guinness is also good if you aim to drink a lot -- low alcohol and therefore low calorie and not too filing, despite the color.
