I like "ANY" engine that is tuned to be responsive-n-smooth, powerful and lively. As long as it's not in a vehicle too heavy for it.
With that in mind, the Chevy Small Block in my Boss 4x4 Suburban on monster tires is a underwhelming setup. Good engine, plenty of mods, but not a good match.
That same engine would be a blast in my S2000.
See my point?
Motorcycles: I like performance biased V-Twins. Ducati, KTM, Honda, Suzuki, etc. Torquey and plenty of satisfying revs too.
But when it comes down to one favorite, today, I feel like it's the...