When I was a youth I desperately wanted a motorbike and as a young adult owning a slow car really fancied the performance of any mid sized bike. I eventually did my test on 125 in my mid 20s and bought a 600cc Yamaha sports tourer 6 months later. Surprisingly I was fairly sensible on it and only came off once when I skidded it on a maybe oily road - I was going very slowly in town at the time so no harm done. Dropped it whilst stationary a few times in "failure to get leg over" incidents (cue Brian Johnson & Aggers). I really enjoyed having it and used it for transport rather than just as a toy. Decades later Mrs PP encouraged me to get another bike so this time got a 1000cc Triumph, again a sports tourer. Despite it being very very fast if you open it up, it is very easy to ride it slowly and pootle along in town, or for medium speed relaxed long distances on A roads. Whilst it's fine doing 30mph in third gear in town, it'll do 60mph in 1st if you go to the red line and 90+ in 2nd so you pass people very easily in short bits of road. It is a bit heavy mind, but fine once you're moving above walking pace. We've been to the Alps, Belgium, Hamburg on it and its great.
Maybe contradicted the born-again-biker danger this kind of semi-sensible bike ridden sensibly should't really turn anyone into a looney unless they want to be. It maybe that ultra-sporty bikes are more likely to be hard to handle and speed catches you out, but weight apart (this) big sports tourer is easy and civilised to ride long distances as fast or slow as you want
This is one just like mine