Long time lurker here...
I know exactly what you mean. I played the vanilla SH3 fairly heavy when it came out...then on to other things (like the life sucking Oblivion.)
Dusted it off...Downloaded GWX a few weeks ago...
My sleep deficit is just ridiculous right now. I'm doing good to get in bed by 0100 every night.
This is as good a place to say it as any...A big thank you and a round of applause to the GWX team for making a good game just flat out excellent.