What was your favorite nitro engine?

[Bondonutz]

O.S., Dynamite, Picco, Lamberto Collari and a bunch of various Dynamite motors. Had pretty good luck with most all of them all but if had to pick a favorite it was a .18 O.S. I couldn't kill and a Collari .32 I had in my LST back in the day, it would pull stumps.
I gave up on nitro roughly 8yrs ago and haven't looked back, I now can't stand the sound of them.
Me and a buddy stopped at the HobbyShop track during a road trip this afternoon to drive our SCT's for a couple packs and a guy was there breaking in his buggy motor. Couldn't stand but 15mins of that and we left, MEH to nitro.