Don't have the riding history of most here, but I'll chime in anyway.
1987 ZX600A: The bike that taught me how to ride for the most part. Better than it's tube framed variants, but still pretty flexible. 20K per head gasket. Wonderful power curve for a 600 despite the lack of overall power. Looked better when I sold it than it ever did while I was riding it. Much sanding was required.
1993 GTS1000: heavy literbike with a long reach to the bars, and the oddball hub center steering. No point in taking the RPMs above 6K. Didn't care about bumps, but lacked front end feel. That was part of it's demise. Lots of bodywork, but relatively well engineered. Miss it dearly even though I still have the remains.
1998 VFR800: The best of the 2 previous bikes combined without the chassis issues. Some electrical issues that were easily solved. More comfortable than either. 4 pieces of major bodywork i.e. get her naked almost as fast as a cheap whore. Aftermarket suspension solved the minor handling issues. 100 HP is enough for me. The VFR has the pull of the GTS at ZX RPMs with better road feel than either.
1994 VFR750: This 20 year old bike has me grinning in my helmet every time I ride it despite the weak brakes, and 127K miles on the clock. Similar to the 98, but smoother throttle response, and a little lighter. Almost too easy to ride fast (PO did some suspension work). Not as easy to wrench on as the 98 due to the overly fiddley, and fragile bodywork.
Some bikes I haven't owned, but had/have at my disposal:
2002 R11150RT: Great touring bike that had potential, but manufacturer arrogance/incompetence ruined the experience. Wonderful power/handling, but hard to wrench on. Serious design flaws. Expensive to maintain, and repair.
2004(?) Ninja 250: Stupid little bike with 27HP put a big grin on my face in the twisties. Kinda reminded me of an ultra-light version of my old ZX.
2001 ST4: Light, torquey, and vibey. Overall quirkey. High maintenance Italian. Almost as bad to wrench on as the BMW, but the comedy of construction makes it more fun. Needs suspension upgrades, but what stock bike doesn't? I prefer the more refined nature of my VFRs, but the Duc always puts a grin on my face until I scrape the hard parts. The Duc may best the VFRs in a drag race, but until it gets some suspension the VFRs will leave her behind in the twisty bits.
I have never bought a brand new vehicle, and likely never will.