I could as well spent the time to learn a new language or watching a movie, but I decided to spent it on having fun with Minecraft. However gathering resources is only one part of the game, using them is the second. Let me put it this way: assume you have a full double-chest of every resource available and 10 of the biggest EU storage units available full of EU. What do you do with it?
Nothing cause you are bored. Though, fortunately this hasn't happened because you had GregTech, so even though you played hours, you still have a goal, which is currently getting a working MB generator. Fusion is on the way.
I know in GT there is no real point of getting the fusion reactor, and that's an issue to me but ... who doesn't hope for Particle Accelerators to get better than Q-Suit ?