I LOVE swimming. I just blogged about it. Swimming is the only way I can exercise at an aerobic intensity.
I can't lift weights on land very easily, but I can use water dumbbells and other resistance tools in the pool.
I'd live in the water if I could (finding a way to prevent drowning while sleeping would be a challenge, I'll admit).
My dream home would have an indoor pool (at least an infinity lap pool) in the middle of the main living area.