maybe, probably actually, but the beaches are similar, the resorts are similar, Riviera Maya is mostly all inclusive resorts...You should definitely see hawaii and Kauai for sure, but I don't think I'll be back anytime soon...
from the limited parts I've seen Ireland is beautiful, but it was mostly from a plane and a short stopover in the airport, it's on my list to make an extended stay
smc when I failed in the spring last year, I was really worried I would have to cancel our trip to Hawaii last fall, but if you allow time in your study schedule for it, it doesn't hurt to have a break in there