My midwives are really big on waterbirth, about 70% of their deliveries are in the water. I was kinda 'meh' on the whole thing, I just always pictured myself having a land birth, although I found being in the shower during labor heavenly, and ordinarily I am a huge bath person. As it turned out I couldn't have a waterbirth with my first as I ended up in hospital with an epi (long story), but since I didn't have any expectations for water birth it didn't matter to me.
This time same thing, I'm all for having a shower or being in the tub during labor, I plan to play it by ear, we will see how I feel at the time. I don't intend to make any special arrangements with a birth pool or anything, fortunately I have a big oval bathtub and if it's not comfortable I don't care too much. My main motivator to maybe do it is that I tore so badly last time and I'd really really like to avoid that again.