Same problem here. Whenever I have a lot of work to get done I just seem to gravitate towards my games.
I've played countless games, and spent countless hours glued to a tv screen/monitor. And I'll admit I've had some regrets as gaming has taking somewhat a toll on my life. I could have had more friends, and gotten better grades in school. Now after looking back at school years I realized I put a lot more time into gaming than my studying. Now, I'm going back to school next year, and (hardcore) gaming is slowly starting to make its back into my life. It's strange. It seems like going to school makes me want to play video games more. Maybe school really stresses me out a lot so I try to escape. I'm sure work stresses me out, but there's just something about school that probably stresses me out even more.
Now that I'm playing video games since I've become more acclimated to working 40-56 hours a week, I've found some way to put more time into video games. It's starting to worry me that I'm becoming my old self again. But, I don't think that'll be possible this time. Playing 15-30 hours a week with a full time job and school just isn't going to work out. Man, playing 15-30 hours a week sounds great! But, I can't do it. I must remain focused on work and school.
I have more than a half dozen great games that I have not completed because I am a University student; I work, too. It feels better to get those good grades at the end of the semester and to have a paycheck (albeit, a pretty lousy one at the moment) than it does to complete a video game. Stay focused, and good luck!
My main gaming problem is that when I have a lot of free time, I don't feel like gaming. When I have work piled up, I just want to stop and play games all day. I suppose you can call it an escape. I'm glad to hear though that you won't let that happen. What are you gonna be studying next year? Wow I'm actually jealous heh, because I actually like school.