Portal 2 in my hand

I was #2 at GameStop to get Portal 2! O_o  Now I'm debating if I have the energy to play some and give it up at a reasonable hour. I don't have to get up til 6:15 so if I only pla an hour I'll get almost 5 hours of sleep... so WTF am I doing online? Celebrating that I got it!! Woo hoo! Months of waiting have paid off. Now I'm wanting Mortal Kombat, the new one. The SNES version was my favorite until now. Guess I'll be shelling out more for that one. Totally worth it.