Being nice bites me in the ass

So I've got this massive computer program, to run simulations, for my dissertation, and it takes 14+ hours to run. Now, I'm on a bit of a schedule (trying to submit an abstract by Monday) but I've been trying not to be an asshole about it, and I've only been taking up one computer in our lab. This afternoon I expanded to two. [our department of about 40+ MS and PhD students has a lab with about 15 computers plus one computer per PhD student office, shared by 5 or more students. bottom line, although our resources are pretty nice, we still have to learn to share] I have to run the program over and over again, to look at different parameters (yes, I could have programmed this part in too, but then the damn thing would run for days, literally, without giving me an opportunity to check up on it) so I've been running up to school late at night to save one set of simulations and start up another round. My friends finally convinced me that it would ok, really, if overnight I monopolized maybe 50% of the lab computers, as long as I scurried back in in the morning and freed them back up for the masses. Well, turns out my office mate beat me to the punch - I turn up at midnight tonight and not only is he running programs on both our office computers (we're friends with the IT guy, so we got a bonus, old, computer) but 90% of the lab computers! Fucker!

It seems sort of unfair of me to feel that way. After all, I was planning to suck up a few extra computer resources myself. And it's only because I have some ill-placed sense of computer etiquette that I'm not already done running my simulations. I was perfectly capable of exerting some seniority and prioritizing my own research needs over other students' daily homework and e-mail checking. And now it nags at me. How come my office mate feels this sense of entitlement and I don't? And which is 'right'?

*and before you geek types ask, no, I can't run my program on unix because that network doesn't have the program I need. and the one helpful IT guy who could install the unix version is out of town until next week