I prefer Steve Irwin to any of them, but I agree he focuses alot on mammals. I liked his shows better when they were all about reptiles. Maybe he should change the name of the show from Croc Hunter to "Any and Every Animal Hunter"???
Corwin is just annoying. I am sorry, but he gets on my nerves. Plus, his show just seems "staged" (lift a log and wow!!! a perfect specimen!)
O'Shea is cool. Hard to understand sometimes (he sounds drunk sometimes, which is funny). It is just his accent, I know.
So, that is my vote.
"To truly rescue an animal one has to provide long-term care that guarantees the animal's security for its natural life, because rescuing is more than removing an animal from a bad situation. Rescue involves restoring and preserving the animal's dignity for its natural life without stress, and this includes conserving the species as a whole for generations to come." (Brian Werner, founder TMLF / TCWR)