To answer the other part of the question, if you don't print very frequently, it's not a bad idea to put it in the fridge.
As for the other, my preference depends on whether you're talking about RC or fiber paper. For RC, I prefer pearl / lustre , for fiber I prefer glossy. (Glossy fiber paper dries with just a bit of a sheen, like RC pearl, unless you heat dry it, which I don't.)
- CJ