Ah yeah.. I remember these days (single, that is - I'm still waiting for those millions myself, to hire that chef). My wife likes to cook, I'm lucky, but when she doesn't have the energy, I rattle off my list of single guy options:
Spaghetti. BBQ Chicken. Turkey Burger. Chili. Sloppy joe. Grilled cheese.
For some reason, it never ocurred to me to open a cookbook, so everything was cooked strictly on a "wingin' it" basis. Also, most of these things share ingredients - tomato sauce, bbq sauce, ground meat, rolls.
I've done some reckless things in my life, and eating my own cooking has to rank in the top ten! Seriously, I'm red/green color-blind, so I'd always cook meat until it turned into a hockey puck rather than worry if it was still raw.