My wife Jean and I have raised two boys, Trent and Troy. Throughout their childhoods, I was able to enjoy a lot of father/son time with them. Just the three of us. Baseball games. Football games. Camping. Fishing.
Looking back on it, the one thing I would change is that I would have done more with each of them individually, to invest one on one time with them. Individual quality time is a great way to show a child love.