I am desperate! Let me give a bit of a background. My DH and I both work nights, but on opposite days. We rarely see each other and when we do, it would be nice if we could spend quality time together as a family. Our 2 DD (6

and 17 mos

) love when we have a rare day off together. Our work schedules do allow us to have one of us always at home w/ our kids, available for soccer, Daisies, no daycare, etc. It's a sacrifice we make that we feel will truly pay off in the long run.
Lately, we've been having housecleaning issues, though. On his days off, I expect him to do the dishes and keep the house tidied up (and he knows this). He takes garbage out, changes the cat litter, and that's about it. He's not very "handyman-ish", so we don't even go there! He does work 12 hour shifts with a 45 minute commute

each way in a high-risk profession (cop), but he truly enjoys being at work. He has a lot of sleep problems (sleeping 1-2 hrs at a time, then waking up for about an hour...it really takes a toll).
I work about 30-36 hours a week in a low-stress job, with only a 15 minute commute

, and get good sleep, so I take on a bit more of the housework (don't we all?). Dishes on my days off, grocery/Target/Sams shopping, vacuum, floors, bathrooms, laundry

, general cleaning.
We frequently argue

about housework and him not doing his fair share - even not keeping up with the dishes. I hate waking up after working all night and seeing the kitchen a mess and the living room cluttered w/ toys, etc. After we argue, things get better for about a week and then he goes back to his same old, lazy ways. (Does this sound familiar to anyone?)
We have so many things that I would like to get caught up on around the house - redoing our front planter, painting the trim around our doors, scrubbing baseboards, etc. However, I can't even catch up w/ regular housework to start doing the other stuff! I've been trying to come up with creative ways to get him involved and make sure he does what I need him to do without sounding like I'm a nagging wife. Lists? Incentives? Ultimatums? I hate sounding like I'm his mother!
Does anyone have any ideas? Please help! I don't know what to do anymore! TIA!