Until I purchased my CB1100, my motorcycle ownership and riding experience consisted of small Hondas since 1966. Like my friend cooldrum, we have keep our beloved 305cc Hondas (my a CB77 and cooldrum a CL77) for decades. I believe I can say the same for use2b with his CB160.
That said, keeping up with an vintage motorcycle does demand time and money. My CB77 has never been out of commission for all of these years. She had over 36k miles on its original speedometer/tachometer unit odometer when it broke. The replacement unit reads 2.5k miles. The CB77 engine has never been apart. Other parts have been replaced or need to be replaced. Each year, I attempt to do a project on the CB77. My recent attempts to work on the CB77 are waning. It is easier to jump on the CB1100 and go on a ride versus working on, or even riding the CB77. This winter, I will commit to a new clutch and new fork seals so it is not so painful to ride!
My experience is if you want a vintage motorcycle included in your stable, go for it. Just consider all the advise offed in this thread when dealing with old technology. And heed to use2b's advice using non-ethanol fuel (aka E0, pure gas) in old motorcycles. I learned the hard way when I discovered ethanol destroyed my carburetor seals! (Carbs were cleaned and rebuild last winter.)
I still love to look at, talk about, and show off my "unrestored" 1967 CB77. We have a lot of history together.