What Sonic Boss was the most fun? =D

For me it was the biolizzard, that was both challenging, and heart throbbing.

Biolizard was good. But I really like Solaris even though I never played it. The music was amazing and you can play as Super Sonic, Super Shadow AND Super Silver all at once! Think Final Hazard on SA2, But with 1 extra character.

I cant decide between Perfect Chaos or Biolizard, both were really hard and fun =D