Congratulations from another mom of 4 (mine are DD16, DD12, DS8 and DD6). Remember that you are now outnumbered, so you might was well give up and work with them rather than against them. On the other hand, you have just doubled your daily hug and kiss quota for the day! A table for six isn't bad-never short on conversation, and there is still room for the occassional friend in the minivan! Holidays are more fun- and there is always someone to play with (or fight with, as the case may be). Does make your wallet/purse a little more full with all the pictures. Don't worry about the hair thing. Pony tails are great, and you can learn "fancier" styles together. The "doing together" is much more important than the final product! She will either end up extra feminine or a real tomb boy with all those brothers- and boy will she know how to handle men!
Enjoy them- they will be grown up before you know it....