I think you answered your question...it depends on the situation.
When betting I like to bet all hands pretty much the same so they can't figure out what I have by betting patterns. If I raise it'll be 3x the blind. Whether I'm raising with A Q or 5 6 suited or even just trying to push some people out of the pot.
If you are short stacked with JJ, it's a decent hand to get your money in there with. There are only 3 starting hands better ;-)