I've had an A2000, A1500, CD32, A1200 (inc towers) and A3000.
Out of all of them I use my A2000 the most. It's an ECS model with a 68030 and a Cybervision 64/3D graphics card. I just love the room inside it which makes swapping cards a breeze and the fact it has just enough bays to mount everything I need internally (HD, floppies and CD ROM).
For some reason, my A1200s in the towers just don't "feel" like Amigas in the same way the A2000 does. Perhaps it's the nasty old PC keyboard that does it.