Buddy is the first dog we've crate trained. I think we started with it because got him younger than any other dog we had and couldn't leave him alone unattended. He's much better now, although I'm still not sure if I would leave him alone for long periods of time.
But he likes his crate. He goes into it during the day - it's facing an east window so he lays in the morning sun. Also, we give him a kong in it when we leave and he goes in to problem. I agree with the others that I think he feels it's his domicile and doesn't view it as a punishment or restriction. In fact, if the grandchildren go over to it he runs over like "Hey, that's mine!" Although he does share it with them.
So while I don't think you have to crate your dog (or maybe you do, depending on the dog) I don't think it's something you should assume they will feel bad about. You might have kids home now, but depending on how old they are, they may not always be around when you're gone. It's a nice option to have him be accustomed to it, even if you don't do it all the time.