Well, it being Valentine's Day and all, there are quite a few things I can think of that would be a "first" for me...they're probably TMI though
So to spare you all the details, I'll go with something else.
Leaving the country
Bungee jumping
Riding in a helicopter
Visiting the west coast
Visiting Alaska or Hawaii
Seeing a poisonous/venomous creature in the wild dangerous to humans
Riding in or driving an exotic car (muscle - yes, sports - yes, exotic - not yet)
Being in a band