That's fine when they are babies, but your 4 and 7 year olds are old enough to know that they may have to wait for something.
Absolutely. And they do. And I teach them about considering others. I don't tirelessy put their every last wish before important needs of my own, but as a general rule of thumb in life their needs come before mine.
Perhaps it would help if I gave you some context. One example of where DH's selfishness pissed me off. It was about 6pm last night. DD 1 & 2 are absolutely shattered as they had a day out in London Sat, had a late night. Was getting close to bed time and they also had a late dinner due to a Just Eat cock up. So a combo of tiredness and hunger had them both at a point where they really couldn't handle their lives any more and were crying at the drop of a hat. DS (1) also has tonsillitis and started anti b's yesterday so is understandably grumpy. DH is watching some nature documentary on the TV, which he loves, but knows the rest of us hate. DD 1 & 2 had not bothered him for hours and were off doing there drawings/puzzles whatever. But then they reached the point where they really needed some down time before bed. DD1 was all weepy n said she really wanted to watch some TV n chill out, but she knew Daddy wouldn't let her. I asked her how she knew Daddy wouldn't let her if she hadn't asked him and encouraged her to go and ask him nicely if she could watch something as she was really tired. He bloody said no!! Even the baby who was grizzling would have benefitted from a bit of distraction but because HE wanted to watch what HE wanted to watch, it was bugger the kids . . . and me who had to deal with them. In the same circumstances I would never have done that. Don't get me wrong there've been times when I've been watching something n the kids have asked if they can put something else on and I've made them wait till I've finished or said they've got tonnes of other stuff they could be doing, but this was different. They were knackered, one was ill and they needed it far more than he did. Plus he'd already watched about 3 hours of it and the kids were soon going to be in bed and he'd have the whole evening to watch whatever the fuck he liked!
Good advice notmyproblem
I think quite a lot of my friends have rather lovely dh's
All my friends think my DH is lovely too (and he is in lots of ways) but they don't live with him.
Husband is much much more selfish than me. Our son is much much less selfish than his sisters
Oh good! So there's hope then! 
Maybe this whole psychology thing is rubbish 