Guinness hands down. The best one I've had so far was served at 42.5 degrees while I was sitting in the "Eagle and Child" in Oxford (I haven't been to Ireland yet).

On a HOT summer day I'll drink Killians or Harp. And when beer just doesn't cut it, I go with Maker's Mark, Jameson, or a Macallan 12.

Duvel, no doubt.

Jackwhacker, Honker Ale, or a new seasonal favorite Full Moon Winter Ale (made by same micro as blue moon).