When I first started riding there were many different bikes available that let you "stair-step" up the ladder of size and performance...I personally started with a Honda Sport 50, went to a Suzuki 150 "tourer" and Kawasaki 90 G3-TR, then an X-6...got a KZ-900 in 1977, and then my Turbo in 1985...
But, there were all kinds of bikes, 50's, 65's, 90's & 100's, 125's, 150's, 175's, 200's, 250's, 305's, 350's, 450's, 500's, 650's, etc., and all were just different variations of the UJM, or Universal Japanese Motorcycle, great bikes and none of the schlockey quasi-chopper or cruiser looking crap that came about in the latter part of the '70's...good serviceable bikes that were not too expensive, that were not too complex, that would get you around with enough style and performance to be a fun filled experience...
Today, the bikes cost too much, have a way too complex make-up, and aren't as available in the smaller displacements in models that adults would like to be seen on...everything seems to be oriented toward the styling of the bullet bikes or the cruiser look...and generally aren't as interesting as what was available once-upon-a-time...
At my current age of 57 I'd still like to have the ability to buy a brand new Bridgestone 350
...or even the Montgomery Wards 360 that I lusted after that was really a rebadged Benelli:
Another would be a BSA Shooting Star:
Just a few not too large, not too small scooters for plodding around town that could be maintained by just about anyone with even a slight touch of mechanical ability...quite unlike the liquid cooled electronic devices with wheels that pass for motorcycles today...
I also never got the Harley thing....I much preferred the Triumph Bonneville to the Sportster...but, I would have to say that if I were to find an old '48 FL in stock condition in a garage someplace then I would have to restore it just to ride it around...but those are heavy suckers, I rode a 1948 Indian Chief back in 1979 and man, was that thing a pig...of course, my daily rider was a tuned '76 KZ-900 then...
I guess that basically I miss the UJM style of bike, and also the British "big twin" style as evidenced by BSA, Triumph, Norton, and Royal Enfield, among others...I also miss the 500cc singles from Yamaha and the Brits...
So, that goes to prove that I'm just an old fart...but I still don't like Harleys...except for the Buells, but the ones I sat on at the dealership were not the kind of scooter that me with my 6'3" frame and over 200 lbs of weight would want to ride for very long...just physically too small of a bike for me to dump all that cash into...my '82 XJ650LJ fits me pretty well...
It's kind of like when I had all my British sports cars, I fit in them absolutely fine, even my MG Midget...take a Miata or a Honda S2000 and I can't even be shoehorned into one of them...