Thanks daan. 👍
Anyway, seeing as how I have yet to respond to the topic at hand, here are my favorites:
1. 1985 Kawasaki GPZ400R (and its RM version) -- It's quite similar to my own bike, in both appearance and performance. It's also very simple and enjoyably easy to ride, and the RM version is about fast enough to keep up with AI-ridden modern 1L RMs on the tighter courses.
2. Any of the other '80s sportbikes, particularly the Suzukis. -- I gotta say, I like 1980s and early '90s bike design better than a lot of the bulbous, goofy, twin-headlight crap you see today. And these bikes are nice and light, making them very enjoyable to toss around on the Nürburgring or elsewhere.
3. 2005 Kawasaki ZX-6R -- The blue paintjob available in the game makes the bike look stunning, and it comes with performance to match. My top choice when the GPZ400R or Choice #2 just aren't enough.
4. 2005 Suzuki GSX-R 1000 -- This bike doesn't need a certain paintjob to look stunning, but the one it comes with doesn't hurt. It's also one of the faster 1L bikes, if not the fastest.