You should definitely check out F at least once, but I prefer the food and drink selection at B. Food at F is usually similar to E, so I usually prefer E because it feels roomier unless I want to use the SkyDeck.
Had three beers tonight, all from TX including two that are new-to-me. Community Beer Company Mosaic IPA from Dallas, High Wheel Beerkworks Dunkelweizen from San Antonio, and Shiner Oktoberfest. This time last year I was a couple days away from heading to the real Oktoberfest.