Well, I can't really answer the first two since for us, TL is always at the end of a bus ride (or two)!!! But it's definitely a great park to do. I'm torn between TL and BB, because I love rides, but my sister and mum aren't always too keen on them, so TL is a great middle ground for everyone.
We shall be visiting BB at least once, but there will most likely be more trips to TL, especially given it's location and the fact we don't drive. We are spending our final day at TL. We're doing early check-in at DTD, then hopping across the road to TL, then heading back to DTD for big meal at Planet Hollywood (I'm not surviving an 8-hour flight on JUST a box of Disney cookies this time!), then catching the transfer from DTD to the airport.
It is definitely a great park, and is the water park that best caters to everyone's taste. I agree with carolfoy that the lazy river is better at TL. BB looks the same the whole way around and you have no idea where you! We all love the giant wave; it's awesome. Most of the time at water parks, my mum and sister sit on sunbeds while I go ride all the rides; TL I couldn't keep them out the water, and all because of that wave!
And, I actually got them to ride all the rides, so that was definitely a bonus! Although after last year, my mum has renamed Crush'n'Gusher "the bum burner" because she kept getting attacked by the jets of water that power the rafts uphill - they are painful when they hit you rather than the raft!