I had a Yamaha RS200 two stroke twin that really let you know when you hit its tops speed of 70mph, especially if it involved curves. I consider that good handling as I knew exactly what it was doing and could ride appropriately.
Likewise my SRX250, SRX400, CB350S, CBR600; however, not my CD200 Benly!
To me handling is judged by a perfect 'like on rails' experience, its more a knowing whats happening experience and that includes small slides, squirms, wobbles etc.