No I feel more feminine as being a total bottom, but however I like and have to be in control of the situation for some practical and safety reasons but try to do this in a subtle way . Yeah we can not get pregnant as a bottom but we have in my opinion a kind of inevitable aspects that have been mostly concerns that woman have to deal with. So there is a kind of practical female aspect to it next to the emotional and sexual aspect that some bottoms experience or perceive as being female mainly because of society traditional roles... It does for me and I like it. The more "practical" female aspects are in my opinion the fact that you have to prepare yourself to be penetrated by cleaning and stretching your ass a little and lubricate it what with most woman is achieved mostly by foreplay. You also have to be careful and responsible towards your body, mostly also comparable for women, they have to be careful not to get pregnant more then their partner that fucks them because it is their body that can get pregnant and not their lover and we as a bottom have to be careful not to get HIV. As we have almost 15 times more chance to HIV then a top we have to be more careful as women do. Taking every day PreP give me a bit the same ritual as woman that takes every day birth control pills. After so many years being a total bottom my sexuality shifted completely to receptive anal sex needing being penetrated to cum also as a woman. After sex I have to deal with the semen of my lover leaking out my as also as a woman has to deal with. Also the interaction of being led makes mee feel more feminine being mostly not the initiator in having sex. Being fingered, held strongly, pampered, turned over, led to suck my lover, etc.
However after all the years my body feminised in my perception quite spontaneously by my sexuality shifting from being protrusive penis-centered to receptive centered as is standard in a biological way for woman. I feel also having spontaneously increasingly less male power and attitude the more I have been in the passive bottom role in the passing years without especially wanting to be (consciously) wanting to fit in that role.
So no I feel not masculine as a bottom!