I have a love/hate relationship with Zbrush. When you can really enter a zen like state and just sculpt, it is amazing. And then without warning, it crashes. Then you get back into the groove, and it decides that rendering really means washing out all the colors you just polypainted for the last several hours.
However, the end result is something I am proud of. This is the first quadruped I have made in 3d. It is also only my 2nd real Zbrush sculpt (the first being a human). I have learned a lot about the program, but I have the feeling there is a lot more, and with that knowledge hopefully less hate and more love.