Yes I agree that E is very addictive and for me at least I have no intention of stopping. From a hetrosexual man to an asexual Eunuch and now to an asexual feminised Eunuch has been one intresting journey and a fantastic life experience. That hoof in my crotch gave me an opportunity to experiece things i never could have imagined.

With a personal caveat (I have non-standard sex chromosomes and weird hormonal balances to begin with), I can say not that much (I had to stop for a short while due to being too poor to afford it). The most effect it's had on me was some slight hair growth on the body (nowhere near what little I had before I started; and what I inadvertently killed early in my transition didn't grow back so if I wanted to live back as male I'd probably have to shave anyway because my leg hair is patchy as fuck) and my libido is down the drain - without e I can barely force myself to care about sex.

And yes the breasts will stay even if you don't have some sort of intersex condition.

I quit in August 2011 and started taking herbal test boosters O also started lifting weights. I have turned my breasts into pecs or the most part but can still feel breasts tissue. I miss taking estrogen and fight myself every week not to go back on them. Sex was better and I was more in control. Since I have went back to my old sel I have had some unsafe sex and find myself being an asshole. I don't like it at all.