The reason I typed these two serieses in one thread is because it is said the Bebop was inspired by Lupin the Third.
Anyway I think Spike is a classic 9w8 (which is kind of universally accepted). However I would take into account any valid arguments you have for him being 8w9 though I will probably find it easy to prove you wrong because he just isn't a core 8 and the overwhelming amount of e9 evidence is too hard to ignore.
I actually thought he was a boring character. Nothing much to him except for his moves.