My dh is always talking about when we could lie in, and when we had great holidays. To a certain extent, I feel the same, and this sometimes makes me feel really awful. That said, neither of us would EVER want things to be different. My ds is also 14 months old, and has been very hard work. He is very demanding, because I think he gets frustrated easily with not being able to talk or walk. I think that he will get alot easier when he can.
Maybe your dh cannot see the future in a good light because he can only remember all the hard work that has gone before. I'll bet that he will be totally different as soon as your ds is talking to him, and looking up to him as his great Daddy. It is a good sign that he felt he could tell you how he was feeling, and could show that he is just needing a bit of understanding from you. I tend to get all defensive of behalf of my ds when dh makes comments, but deep down, I appreciate the truth that our lives HAVE changed irrevocably, and can empathise with him.
In addition I believe that men are programmed differently to us, and that they do not adapt to the boringness of being a parent to a very young child. Obviously, I am not saying this as a scientifically proven fact, it is just my OPINION (before anyone shouts at me!!!) I have noticed that I, previously an intelligent woman who held down a very stressful and varied job, have become happy to discuss all aspects of babyhood with a higher boredom threshold than I had prior to motherhood.
Good luck, and cut your dh a bit of slack. He can't help being a man!