Kubota R510 Wheel Loader + Cab and backhoe, JD 6200 Open Station, Cushman 6150, 4x4, ten foot 56 hp Kubota diesel hydraulic wing mower, Steiner 430 Diesel Max, Kawasaki Diesel Mule, JD 4x2 Electric Gator
Aside from not having a large assortment of fittings, playing with this stuff for purposes of experimentation is always so darn messy! Plus the high cost of oil. In this sense, the electrical world I live in with all my alligator clip leads is so much easier to try stuff.
Of course, and if we only had a good hyd test bench with all the pump, motors ,valves and fittings, etc to try different things, we could learn so much more.