Originally, I was going to go for the sleeve surgery. My friend has already had it done and I've heard very little complaints from her. I also thought it would be nice to have something to 'share' with her. I joke that bypass is 'Frankenstein-ing your insides', but I am also a bit serious about it, too. The sleeve seems like it was just an easier procedure and I was told that you lose your hunger hormones, which seems helpful, too.
However, after talking to my doctor, I was recommended to do bypass due to my acid reflux & heart burn becoming worse after the sleeve. I was also told that there is a higher percent of weight loss to be expected when going with bypass over sleeve. He warned me of possible dumping with the bypass (but since being on these forums and talking to others, it seems to happen from having either surgery). He also said that it really only happens when eating food you shouldn't be eating in the first place, and I felt that.
He said I could choose either, but I'm set on bypass.