When I was in my early 20's I used to drink lager, then my friend introduced me to Ale, and I've never looked back!
I love pale ale more that bitter ale. I like Hobgoblin and 49. They all have unique tastes and are good in Winter where they can warm you up.
I like tasters and when you get 3 1/3 pints so you can try different flavours without drinking too much! Remember don't drink and drive. I live near 2 microbrewery's that specialise in Ales, so I'm spoilt for choice. There is also a pub near me that brews Ale in house.
There's also a group called CAMRA (campaign for real ale) where you can join for something like 10 or £20 a month and you get money off coupons. Worth it if your a big drinker.