"I pick..." you start.
You are about to say something, anything, but something else comes out of your mouth.
"... a nymph! I want to stay a nymph!"
The minotaur looks at you, understandably bewildered.
"You... You do not wish to change anymore?..." he asked, dumbfounded.
You giggle. What an idea! Why would you wish to change? You are a nymph for crying out loud! You are young, immortal and will remain eternally so. You are pretty for all eternity. What is there not to like, by all the gods of Olympus? You'll live in tune with nature and dwell in a place of eternal spring and summer, or at worse early fall. A life of pleasures and plenty. You shall have no more worries typical of the stupid human world like homework, paying rent or taxes or silly worries like health, violence or drugs or diet and ugly human perverts. Males here were so much fun and interesting! Sex would be fun and free, away from the shackles of prudery and ill-thought morals. If the partners are consenting and adults, when what is the harm? Kids will be raised by entire communities, away from restrictive human customs. And penises! What was so disgusting about having a penis inside of you, whether in your womb or in your mouth? Penises were fun! And funny! And speaking of intercourse...
"Do you want to mate?" you coyly ask the minotaur. "I'd like to thank you. Or do you want a massage?"
"There are plenty of willing participants for that elsewhere," simply said the minotaur.
He looked at you and understood your change of mind. Obviously, your transformation had literally gone to your head quite fast, catching up for lost time. You were now thinking like a nymph. There was nothing to be done and indeed you seemed quite happy, not taking grief in what you'd lost, mainly your manhood. You appear to embrace your new nature and life whole-heartedly. And he could see that your desire for intercourse and a release to the sexual tension that was mounting in your body was only increasing and would demand attending really, really soon.
"I am not interested. Not at the moment, at least. But you can go back to the satyrs you met earlier, or find other nymphs. Both would be delighted to take care of you."
You smile at him. Now both sound like excellent ideas!