I'm an ex-civil engineer and life-long legomaniac, so my particular favored form of lego artistic expression is the sky-scraper, although I am currently working on building a rather convoluted and hopefully side-splittingly funny Vignette script that I'll dole out in Lucasesque sequels, prequels, and eventually my own line of lunch-boxes and collectible crazy-straws. (not the "ShangHai's Hottest Buns" vignette, something else that I'm still working on, something big, bigger than a bley 6x24)
I travel about 50% of the time to Asia for work, so I only have a good 6 months out of the year to build at home. Factor in the lead-time for bricklink purchases, and I'm down to about 4 months per year for MOCing.