Southern Miss is currently Adidas. Most popular shoe with that age group, so I am happy it is on the jerseys. Also the most comfortable shoe for me, so bonus cool points to them.
Previous to that were our Russell years. I understand from our equipment folks the gear was the best jersey product. But man, that's embarrassing to be running out in Russell at our level.
Previous to that, and for a long time, we were Nike. I also understand Nike jersey products did not hold up for crap, but the designs were cool.
Before that, I do not know if it was by contract or just colleges getting what shoes they wanted, but we rocked Pony some back in the day.

What has your school used? What is your favorite ones?

That's exactly how I feel. Adidas is better quality but makes some odd aesthetic choices. I'm not a fan of the weird font face we use for the numerals on the jersey. I believe we went from Nike to Adidas in 2014 or so.

The Cajuns Adidas football uniforms look too baggy for my liking.