I know this is heresy, and this is completely a matter of personal taste, but I would say that in 15 years of flying aeros (at a 'just for my own fun' level from Fireflys through Zlins and Caps to Extra 300s) the only flight I really didn't like was the front seat of a Pitts S2. Maybe it's my build but I felt like I was stuffed into a coffin, horrid visibility / difficult to orientate, very twitchy, stench of hydrocarbon. Might be the mutt's nuts from the rear seat, and I know it's great value relative to other options but my first experience deterred me from finding out....