I really want to play a Final Fantasy game at some point, but always seem to find something else play. Same thing goes for Dragon Quest games. I could ask everyone here which game from each series you recommend, but would I actually play it? Probably not. 😔
As for a single game I own, I will probably never play Disgaea 5. It's been so long since I bought it.
Undertale is such a small time commitment compared to New Vegas. It's a very compact, truly charming game whose characters and music will carry you through whatever objections you've had to it before. :trans-undertale: