Hell even if it takes me a week to paint a room, it's not the end of the world. If I'm at the place two years so be it. I just say a year because you either have to buy another property or report your capital gain and pay taxes if you sell in under a year. [MENTION=2988]b00sted[/MENTION] can confirm that one I think.
I'm not an accountant and everything we do is held for less than a year(save for a handful of rentals).
I think it's beneficial to hold it for over a year... You'll pay a much lower capital gains rate on the profit when you sell. if held for under a year, you pay whatever tax rate/bracket you're in. Plus there's the homestead stuff and a few other tricks.
You can also do a 1031 exchange and roll all of that money in to a new property, and I think that has tax advantages as well.
Like I said though, I don't really know that stuff. We buy a place, sell it in under a year, and let the accountant figure everything out.
edit: And in your case, you're exempt from capital gains taxes(profits up to 250k) if you live there for at least two years.