I only use female condoms. I understand some folks have had not so great initial experiences with them, and I propose that there is a learning curve with the FCs.
Its fun to insert them in front of curious gents and couples (no room for shyness here). When inserted properly, which includes add a little extra lube to the inside of the condom itself, they are the most comfortable technology on the market. Also they are polyurethane and not latex (for those of us who eschew latex).
The extra lube inside makes it nice and wet for whatever you are being penetrated with. That wetness means that the phallus can slide in and out while the actual condom stays put inside of the receptive hole.
For me, I get all the sensation of pressure and fullness without the friction of regular condoms, and for the male, they get all the ecstasy of not wearing anything at all on themselves and still enjoy the warmth of my body. Its as close to the real thing as it gets.
They also seem safer. I can't tell you they are statistically safer but they don't break, they don't fall off and they don't fall in. They are great for smaller guys and super large guys as well as males of any size who just don't get rock hard. No shame - bodies are bodies and not everyone has an erection of steel.
Anyway, back to the beginning: I will only use FCs when the occasion arrises. Although really and truly, that's not my speciality and not what folks see me for. I'm an oral artist, and beyond that, most of my sessions focus on me filling other's holes (yes, toys for boys, pegging, strapon worship, fisting and the like)