Our personal preference was Blizzard Beach over Typhoon Lagoon. DD 5 and DS 4 absolutely hated the family raft ride at TL because you get slammed with water non-stop during the entire ride. The family raft ride at BB, though fast, wasn't like this so they enjoyed that a lot more.
You'll get a lot of varying opinions, but we just thought BB had more to offer, more fun slides for a wide variety of folks, we liked the lazy river better, the family raft ride, everything about it. This is kinda funny b/c we had been told prior that TL was better for smaller children. The one thing we liked better about TL was the wave pool, but we couldn't use that much due to the ages of our kids.
One other thing to consider, TL is supposed to go through a major renovation that should be complete by the time you are there. I don't know if this will change the park layout fundamentally, but you should be aware.