I have 3 boys, 8, 5 and 4 months. From my experience I have found this gap to be wondeful. I have the time to enjoy each of my kids as individuals and had enough time to share around. I spent 2 and a half years enjoying my first, when Jake came along. Brandon started kindergarten and I had that quality time with Jake. Now he is starting school next year and I will get those special moments with Lachlan too. I have found that I have different relationship with all of them as I have gotten to know them one at a time. A lot of my friends who have kids really close together, often say that the first 3 to 4 years with them are a blur as they were always tired and busy.
This is just my opinion and experience, but I have really enjoyed my kids and we have special memories of doing things together as a family as well as alone. Enjoy them while they are young. They grow up too fast and before you know it they become these little independent people with minds of their own!