First Rolex purchase then ask for waitlist - Acceptable?

[Future Cell]

After giving up on the Submariner waitlist. I ordered a two-tone Datejust w/the gold fluted dial, which I am happier with anyway, still waiting for it to come in.
This is my first Rolex & new to the AD. I am absolutely in love with these watches & want a professional watch for other occasions.
I was wondering if it's acceptable to ask my AD to put me on the waitlist for the GMT Master II Batman -since its like a 2 year wait, when I go in to pick this puppy up.

Should I just enjoy the moment and not ask for that? I don't want to come of in a negative light by immediately being in the market for another watch.
Thoughts?

I am also in my mid-twenties if that has any judgement on my credibility.