Hey Julie,
I have been full time for two years now, almost to the day, and the elation has not worn off for me. I am not a big mirror gazer, so almost every time I see myself, it still makes me smile. For so long I hated who I was seeing in the mirror, and now I love who I see.
Yes, I still have a male body, but no one really sees it besides me, my wife, and the doctor. I really live my life as a girl now. My new accepting wife encourages me to be more passable and likes that I am a girl. Do I wish my transition was farther along? Sure, but it's really down to logistics now, everyone concerned is on board with it or out of my life.
I think certain TS's may feel more elation than others depending on how much they suppressed and for how long, although that is just anecdotal and I can offer no evidence to support that conclusion. I do agree with others that when your life seems normal again, as a woman, the feeling will subside somewhat. I also agree with others here who feel it may just be you freeing the true person you have always been, but just never knew it. I think you are just one of those happy people.
I hope and wish for you that the feeling never subsides.
Love always,
Elizabeth