Attractive, a GF connection, smart and someone that's not a human time clock/cash register. My ATF's bring their overnight bag and we enjoy a whole evening - in all the ways we like...
I have had VERY few ATF's.... After all "AT" stands for All Time....
But with each of them there has been a relationship that went beyond the hobby alone. We connected on a variety of levels and there was time spent in each others company beyond that which was compensated.