It’s true, money doesn’t mean happiness. I happen to know someone who’s father has literally billions and trust me he isn’t any happier than you or me. Once you have a million you want 2, then 3, 4, etc. It never stops. The only way to be really happy is to be happy with what you have. Which, by the way, what we’re currently working on in the middos thread for anyone interested.
As for what I’d want, I’m with mazal77 – moshiach! So much of what has been said in this thread is included in this: world peace, getting closer to Hashem, not having to make a parnassah (at least I think some sheitos hold that), etc. And just imagine having a Bais Hamikdush built again!