To be able to stop time at will and still conversate with the people that I care about. I have time to further myself, but I've been sheltered of for much of my life and it's terrifying to try and pick myself up to conversate with new people that do know me behind these aliases I hide behind. Under these, I can feel social and finding people willing to let me express myself in a way I can't really do in real life without being put as an example for an unstable person. What abundance of time I have often is wasted because I just want to talk or play and people have jobs and life to deal with. I want to be immersed in my friendships not unlike those portrayed in G4 and willing to give people time to get to understand them, but that is getting very hard to do outside of those who do know you.
So, just giving a welcoming break and just sit down and listen/have some fun playing with games without the threat of time passing would be something I would wish for and would probably use non-stop for a while.