Mtb, fat, and "holy crap" sized hubs. Building my second set of wheels with 9:zero:7 hubs. Bearing and freehub quality are second to none; highly recommend. Bearings spin for days (much better than the average high end hub) and have held up superbly. Freehub internals are much larger than average plus the pawl's give off that "not gonna bust me" loud clack/clack/clack. Tough, light, smoooooth.
I was raised in the "hood", self-taught to survive on scraps of old inner tubes and changing bike tires with my teeth. Life is a struggle for me not to be another statistic that so many become after being raised in a caucasion middle class family. I now am a husband, bike mechanic, land lord, stay at home dad, and wannabe mountain bike racer.