i like to give my lady friends a safe word, even though i'm not the kind of guy who would usually push a boundary. rarely has a lady had to use it.
in terms of my own boundaries, i have become more confident as a lover, though i still have a long way to go. as a young man i was literally frightened of women (way beyond shy into pathological), and the lovely women that i have seen in the hobby have helped me become comfortable with my own sexuality and ability to find and express my own desires and the desires of my partner.
haven't seen a ts, nor have i looked for domination or bondassage or that such, but i would be open to it within the context of the hobby if i met the right person. however i'm having so much fun with straight ladies i don't know if i ever will have the inclination, time or esp. $$$ to wander that far afield.
i have recently gone over a personal boundary; before my wife left me i always insisted on covered bj's; now i figured what the hay i got nothing to lose, so as of a few months ago it's been nothing buy bbbj (with lots and lots of cim) for me, something i had never done in the previous 9 years of hobbying. i know that's probably pretty weak sauce compared to the rest of you, but it is a boundary i willingly crossed.
i know what we do is considered by most of society to be immoral and depraved; i have used it for personal growth.
so sue me.