I prefer 2 stroke engines, but then again I will admit that I am addicted to the smell of Sunoko 110 leaded race fuel mixed 40:1 with Klotz 2 stroke oil. I started just running it in my trail quad, but am to the point that I run that mix in chain saws and weed eaters.
It does get kinda expensive keeping that mix in the 115 Mercury on my parents boat, but thats OK because I do not take the boat out often at all