I am married, and have been since 1984. I have three children and my favorite (but very old) picture of them is the following:
I
like this picture because it totally captures their personalities. My
son can't sit still long enough for a picture to be taken, my oldest
daughter is prim and proper with her hair perfect, and my youngest
daughter is just having a good time (note food under her seat). These
traits have carried on over the years, and they remain very similar as
adults.
Here's another one of my favorite old time pictures:
Ahh, those simple days.
When the family was younger we'd "camp" in the summer, usually near a warm lake in a motor home. This picture was an exception when we spent some
cold days at
Whistler
Since 1994 we've "camped" in Lake Chelan.
Don't go there,
it's terrible.
Here is a
picture at Splash Mountain in 1999. My wife
really likes these kinds of rides.
Here's a shot at Disneyland 2008:
Who
says it never rains in southern California?
and the family in 2002:
Things
hadn't
improved much by the 2004: 
Emily, the youngest, was a serious gymnast until the fall of 2003 when a fracture in her back ended her career. Gymnastics is a ridiculous sport. She would train 24 hours a week. But she was good. At 10 she won the all round gold medal for BC in her age and level. At 11 she qualified to tryout for the national team, but didn't make it. At 12 she competed nationally, until the back problem. Here she is doing some type of back flip on the beam.
Here's her brother
at the same competition.
He's always loved his down time.
They do grow up.

Notice
how my daughter doesn't even have a shovel!
Grandchildren are just as argumentative as children, you 