Every spider I've had the chance to lay my hands on

Following on from Scarab's excellent advice, I would add a couple of things. There have been many that have condemned handling for various reasons and much debate as to wether T's can be 'tamed'.
Firstly remember that T's have personalities and you can encounter a very aggresive G rosea and a totally handleable P muticus. The most important thing is the approach as Scarab said and reading the body language. After that ALL T's can not be 'tamed' but definately become 'accustomed' to be handled (this is my opinion and I don't really care what anyone else says lol).
Admittedly there are risks involved with handling T's (getting bitten, flicked or worst of all, injury to the T itself), however I feel that if that's what makes you happy as a T keeper, that outweighs the negatives. My kids have converted hoards and hoards of friends and their parents from arachnophobes/killers/haters to T keepers and enthusiasts by holding them and breaking down those barriers!
For me that effect is far more valuable in the longrun than the 1% of handles that go wrong....