IMO i dont care who you are you shouldnt start on a 1 liter bike too much power.
i learned how to ride on a honda cb 400 and it was an alright bike and it still put a smile on my face cause i was out riding on my very own bike.
my dad has a 1997 harley dayna lowrider 1350 thats been punched out 20over with screaming eagle internals, big cam, drag pipes, drag bars, and a custom real fire paint job. i wish i had pics of it. that thing when its idleing just sounds great.
ok so the bike i would ride IF i had the money is a harley-davidson 883 sportster with a 1200 big bore kit, that setup flys.
i also like sport bikes and i think if i had to choose a sport bike i would pick a yamaha r6 those bikes are nice.