Computer-Noob said:
Mine is for a significant other.
Pretty much this. I tend to be quite apathetic; it's very hard for me to motivate myself, and I have a tendency to not really care about anything. I can honestly be quite depressive sometimes. Then I met my girlfriend and everything changed. I had an actual reason to care; a reason to not just say "screw it", and give up on everything. Now I can motivate myself, knowing that when I'm done, she'll be there waiting for me.
I'm well aware that that made me sound like a hopeless romantic, but that's the way it is.