I only preorder, when there is a game I really want to play at release and there is some kind of discount or bonus.
For example by preordering Skyrim Vr, I spent only 53 euro, instead of 65 and saved 12 euro and will get it at release.
Or I also preorder when there is some really good bonus content. For south park: fractured but whole not only I saved 2 euro (instead of the full price on release day) but I also got the first game for free.
Apart from the above situations, I don't preorder.
For example by preordering Skyrim Vr, I spent only 53 euro, instead of 65 and saved 12 euro and will get it at release.
Or I also preorder when there is some really good bonus content. For south park: fractured but whole not only I saved 2 euro (instead of the full price on release day) but I also got the first game for free.
Apart from the above situations, I don't preorder.