If even only once, I think every family should splurge on "non-traditional" family portraits. I have a little addiction to these photos and we make the trek to Madison, WI each summer or fall to visit our FAVORITE photographer in the whole world, Jen Roh. If you live within driving distance (or if you REALLY like to splurge and within flying distance!) you should make an appointment with Jen. You won't believe your family could ever be so beautiful!! We've had lots of people say our photos look like they should be in a magazine (and trust me, it's not because of my overwhelming beauty...LOL)
This is the third year we've had Jen take our photos and again, of course, she didn't disappoint. You can see our first year here. Apparently last year I was lazy and didn't post those photos...they rocked too, just sayin'.
In conclusion, find a photographer you love....and splurge.
In thirty years you'll thank yourself. :-)