I wouldn’t call it an orgasmic experience, but two of the bikes I used to regularly ride that stood out (in terms of ride quality) were my first Basso Gap (‘84) and my De Rosa Professional, which has changed hands through several forum members. I had a half-dozen really nice bikes to ride at that time, but would generally take the Basso, despite its taller gearing, for pleasure rides. It just had a quality I thought of as “eager.” I sometimes regret selling it, but the De Rosa has filled that “gap.” One beautiful bike I owned was a Pinarello Montello. It was gorgeous, despite the flaking stickers, but it’s ride quality was meh.