I have a maxon od9 analogman classic, an od808 keeley, a oliver sd-10 (roland licensed boss sd-1 clone) and a zambelli catalinbread picoso clone, but I've been preferring my couple tube loaded pedals lately: maxon tbo9 (based on the od820, but with a real tube boost circuit) and a juansolo baby boobtube (vox based single gain stage)
I love the regular solid state overdrives for that dry midrangy boost with focused gain, but the tube ones make my tone thicker and smoother but still giving some focus
the tbo9 gives me a huge mastodon-like tone with my modded '73 jmp
I like how the knobs interact by pushing the output but changing the feel... it has the regular drive, level and tone, working like the od820 (which has different blend circuit that mixes the dry and distorted signal together) and the boost knob, that controls the gain boost from its little tube
I'd really like to try the green tod9 version, which is supposedly closer to the regular screamers
the juansolo used as a clean boost sounds more transparent, just making everyhing bigger, and pushes the amp gain quite hard (lot harder than the picoso clone), but seems to make the frequencies and harmonics expand, unlike a solid state clean booster
lowering the amp gain and pushing the pedal harder, I get a really fat and open Soundgarden-like tone, pretty smooth and keeping all the string separation
I tend to use the juansolo always on as a clean booster in low settings with the amp set on a mild crunch and the maxon for the heavy stuff