Personally I don't see any difference between a 'motorcyclist' and a biker. at the end of the day we are all out there on two wheels (or three) for whatever reason you do it for,
There is enjoyment (which is me) I love just being out on it, then there's cost, practicality, etc.
when I nod at people I don't discriminate what type of machine they are on, be it Harley, sportsbike or whatever. It's their choice whether they nod back, some do, some don't.
There is the 'biker lifestyle' which I see as all your rally's etc, your bike builders, modifiers, etc. Depends on what you personally get out of it.
the overall thing for me and what I REALLY love, coming into biking at nearly 50 years old is the camaraderie.
If you get a group of car drivers turn up at say, the Bassetts pole to choose a local example, none of them will talk to the other, go about their business and depart. When you roll up on a bike and there are other bikers around, more often than not you will strike up a conversation about bikes, where you've been, places to go etc etc etc. help and advice etc
Brilliant
So there's my tuppence worth.