Reaction minigames get old after a while, but this is a game you'll continually go back to, time and time again.
The minigames have some variety, but most are based on "how quickly can you press a button once we tell you to?" and little skill is involved. A good deal of the minigames is luck, and the rest requires you to train vigourously for long periods of time. Which is difficult, because as your character ages the minigames get much harder, and so you might find yourself creating many, many, new characters just to get the feel of swordfighting.
Once you've spent long enough playing the game to actually have fun with it, you're bored. And that is where the key charactaristic of the game comes in.Once you've developed a skill for the minigames, as well as a feel for it, no matter how long you've played it, it won't go away. That is one of the good parts in the game. You can play it for a couple days, wait a week, come back and not have missed a step. It's a good game for anyone, and because it's 4 and 1/2 years old, it's never anything over 20$. It's also backwards compatable with the 360. In case you were wondering.