@Tomislav - I would most definitely paint another ceiling, if I had the right room! I painted my dining room ceiling a mahogany color which mirrored the color of our table. One of my friends who loves interior design suggested it because she knows how much we love to entertain and have others over for dinner.
Needless to say with the color that I used there was a pretty dramatic effect. So if I was going to do it in another room it would have to be one that I would want that dramatic flair in, like a library room or maybe even a bedroom, but not our places to rest like our TV room.
I am not sure if it made the room seem bigger or smaller; but I do know this: I have received a ton of compliments!
I also know this: as I mentioned, my husband is a realtor and no matter how many compliments I receive on it I am going to paint over it when we try to sell the house. The ceiling would probably be too dramatic for potential home buyers to see past.
Another idea I can't do, but I would love to see done, someone painting their faux wood beams. I love how natural wood looks, but since it was faux wood it might be decoratively speaking-legal! And wouldn't painted beams add so much character?