I had Christmas pictures taken the other day in their fancy Christmas outfits, that I didn't love but they are their official Christmas outfits, and in their Christmas pajamas, that came out adorable, and then today in their Jets shirts with Santa. I thinking putting a picture of the two of them together with Santa, then an individual shot of each in their Christmas outfit and Christmas pjs. This would mean 5 pictures of 2 kids on a Christmas card. Is that overkill? DD's 1st Christmas card had 3 pictures of her I and I thought it looked great.

Teterboro 5K 7/16/11 23:22
Tenafly 5K 6/5/11 26:48 1st in age group and stroller division
Teterboro 5K 7/17/10 24:42
Lincoln Tunnel 5K 4/25/10 28:18 4 1/2 weeks pp
Teterboro Airport 5K 7/18/09 22:35 3rd place age group 4 1/2 weeks pregnant
Long Branch 1/2 5/3/09 1:51:07
Lincoln Tunnel 5K 4/26/09 22:22
NJEA 5K 11/7/08 22:30 2nd place age group
Westchester 1/2 10/12/08 1:50:16
Teterboro Airport 5K 7/19/08 23:43
Long Branch 1/2 5/4/08 1:54:18
Giant Stadium 5K 4/26/08 error in timing
Hackensack 5K 10/14/07 23:55 1st place in age group
Re: WDYT of my Christmas Card?
Are the pictures significantly different so far as poses and facial expressions? If so, it could be ok, but I'm inclined to tell you to skip the pics of them in their fancy outfits, and just go with the Santa and PJ pics.
I think if they are all a little different and good pictures, go for it. I always do the cards with a bunch of photos bc I usually get photos of all of us done outside each fall in part for holiday cards and we live far from our families and long time friends so I like to share a few photos that way. Go for it if you think they look good!