The games that I like, they usually have plenty of them when they are released and they've never been hard to get that I can remember. Now, I don't know if my hubby has pre-ordered any games when he's bought me games for my birthday or Christmas.
I don't always pre order games, I tend to buy them on day one if I'm really excited. The only games I think that I've pre ordered so far is Super Mario Odyssey. Which reminds me, I need to go to GameStop today and pre order Smash Ultimate. I've been meaning to do that for a while. That game won't be on shelves long.
Depends.
If I feel the game is getting so popular that it might be sold out after the first hour of sales, I pre-order.
Or they simply include some nice things, like with Pokemon Let's Go Pikachu/Ibui when pre-ordered at a Pokemon Centre.