Not that great a selection IMO.
They usually have an Oktoberfest in Germany as long as you are there in Sept/Oct that is good.
The Guinness is good in the R&C pub, I assume this is because they keep the pipes very clean.
During the F&W your will get a few more options at the beer booth, a few of them your rarely see on tap like Pilsner Urquel.
Purple Haze is good.
I do not recall any really bad beers, other than the Guinness from the Ireland booth.
They did not do a good job at all with the Guinness last year.
Now that good beer is so popular it would be nice if they added a few more options.
We have several pubs in our area that have over 30 quality draft beers on tap.
A couple of cask conditioned and 100+ bottled beers as well.
I do not expect Disney to match that, but it would be nice if they had a few more options.
Every restaurant has a good wine list, they can have a good beer list as well.
BTW: If you walk over to Boardwalk there is a brew pub and I think you can get a flight of several beers they brew to try.
I have heard the beer is good, but I have not tried it yet.