For about six months I thought hormones were making me stupid (but attractive!), and I felt that all my learning and concentrating abilities were disappearing. A friend left a comment on the blog post I made about it, that it probably had more to do with the constant thinking about how to act, talk, pass, and live full time that took up a lot of unconscious brain space. That actually made a lot of sense.
I felt unable to do a lot of things I could do before, but I felt I had been using them to hide away from the world anyway. If you have a 1,000 page novel to read in old Chinese, it can do as good a job for months as alcohol or drugs for keeping your mind off the questions "why can I not have proper intimacy?" and "Why do I feel so strange when i look at women and their clothes?"
A year after full time many of my interests came back and concentration is almost back at normal levels. Erudition is no longer needed in my life as a diversion, and i can enjoy clothes and hairstyles and all of the other things I used to avoid looking at.
In the end transition has just made me feel normal and balanced, SRS even more so.