After 50+ years doing it just one way, I'm too set in my ways to switch back and forth between left-side and right-side shifters. I have to get my classic motorcycle thrills with what I know how to ride instinctively without having to think about it (even for a split second) and then adapt.
Sure, modern bikes are super efficient, agile and ultra low-maintenance, but they all tend to look like tupperware covered rocket ships as time and technology march forward. Maybe I could move somewhere else, but I can't think of many places where a streamlined 150+ mph dildo would be useful today.
To make my pulse quicken, I prefer classic bikes.
Yeah, there's the whole rough ride, oil drip, points and carb adjustments, Lucas ("Prince of Darkness") wiring business. But those bikes were (to me)
exciting and they still are.
In homage to that vibe with modern efficiency, I recently put some time and effort into a '75 XS650. Upgraded all the invisible handling/reliability things (front and rear suspension, bearings, brakes, ignition) and stripped off all the 1970s crap (dashboard, high bars, huge signals, foot-tall rabbit-ear mirrors, gigantic tail light, ugly pipes and couch-sized seat) so I could still see there's a motorcycle inside there.