What kind of oil... Such a subjective subject!
My son has a friend who went out to motorcycle tech school in Arizona a few years back. He must be in his early 30s and rides an rc-51. He wont even look at a spoked wheel bike.
Personally, I love them all. Yes, I understand old bikes, and am not put off by limited isolation from rough roads( hell I grew up on english sports cars), pogoing during cornering, pathetic brakes, filing points contacts, etc. etc.
But I also like being able to go long distances without having to take a leak every 20 minutes, not lusting after the extra tranny gear I dont have, and still being able to stop or turn even if I pull the periodic bonehead move. Better still, I find some new bikes very visually appealing. Maybe not like a chrome tanked Lightening, or with an exposed distinctive engine piece like the sohc valve cover(my all time favorite), but... I guess I mean if bikes were all the same, what reason would I have for having a garage full of them?? To me they all have personality. The word character
is interesting to me, as that word is also used to describe someone who is at odds in some way with everyone else, someone who will most likely not respond in a predictable fashion. I am not sure that is something I want in a bike.