I almost never play jacks or better video poker anymore.  It is to video poker what blackjack is to table games.  That is to say, relatively boring.  Unlike blackjack, whose strategy is more complex than most table games, jacks or better strategy is about average in complexity for video poker.  Overall, though, it is the least volatile of the video poker games.  This means that your chances for big wins (or big losses) is smaller than with many other versions.  There is only one big winning hand in jacks or better and that is the Royal Flush.  It hits about every 41,000 hands, it will take a few dozen hours of play to hit one, on average.  In between, there's a lot of High Pairs and Two Pairs.  And, even when you hit a Four of a Kind, it pays 'only' 25 for 1.