I will come in, look pained in response to any questions about my day, and ignore any comments directed at me 'because I had my earphones in'. I shall then complain loudly that no-one told me about dinner/time to go out etc etc.
I shall decide on a weekly, preferably daily basis, that I have a new food hate, and therefore will not be eating the meal that until last week/yesterday was my favourite. Often leaving mentioning this until after it's cooked and on the table.
I shall complain endlessly that there is nothing to eat. I shall combine this with eating the contents of all the cupboards and leaving the dirty plates/bowls/cups in my room, and dirty utensils etc all over the kitchen. So the house-cleaning fairy can rinse cans and put them in recycling, put dirty stuff in the sink, wash it, dry it, put other waste in the bin, clean the surfaces, pick stuff off the floor and bring said plates down.
No idea what we'd do without the house-cleaning fairy.
Needless to say, like others on here, all my stuff shall lie in random locations on the floor around the house. Bathrooms shall be occupied and the floor left soaking and damp towels left wherever they fall.
I shall have great fun demanding money/ingredients etc with no notice at all, and when this is commented on, I shall meet objections with loud complaints and plentiful eye-rolling.
I shall also wear VERY SHORT SKIRTS and dodgy eye make-up. 
Wink: 