Who are you buying this game for?
If the game is for you, get it for you.
If the game is for your kids. Get it for the kids.
If your kids want a say in which game you pick, pay attention.
If they say get game x without touching it, they are just looking at a theme-box. You could end up with a super Mario world or a hello kitty pinball game if you aren't careful.
If they play the game and they like playing the game, this is a different matter. You may want to get the game on their recco. But if they lose interest quickly, see if you can trade or swap a game. If you want to give the kid a choice in the matter, see if they will put some of THEIR OWN money into the buy. It's a good tell and lots can be learned through the process.
Listen to your kids.
Listen to yourself.
Have fun and enjoy the process. You can always trade a game later once you are done with it. A good game for you (and your kids) will stick around.
Happy hunting!
c2s