I know you can look back and always go "aw!", but it was really hard for me and her growing up = me getting more relief in a lot of ways. Right now I'm amazed at how much she has developed - she grabs things so fast and really knows her way around now. But still most days I'm still ready for her to be moving on and developing. Maybe its because she hasn't been quick to do anything yet - I always feel like we are the last ones to hit a milestone!
Re: Anyone not sad that their baby is bigger?
Well said.
i am actually really ready to move on from the baby stage where she's completely dependent on me. i cant wait till she can move, walk, talk, eat more! i think it'll be incredibly exciting. i know ill miss things here and there about her being a baby but im so exciting to watch her grow and learn and turn into a little person.
I'm not. I hated the baby stage w/ DD1 because she was SO hard and colicky. DD2 I enjoy it, but I also really love seeing both of them grow and change and do new stuff.. especially as DD1 gets older and now she's talking and she is just so funny and the things she says absolutely crack me up! I love it.
I'm sure when they're PITA teenagers, I'll probably miss this stage.
But for now, I'm enjoying watching them change and grow 
BFP 5/07 - Kylie born 2/08. BPF 2/09 - Alexandra born 10/09.
TTC since 8/13 - diagnosed difficulty conceiving due to LP defect. Took vitamin B and Vitex Berry to help lengthen.
BFP 2/14 - Missed M/C found at 8.5 weeks. D&C at 9w2d. Partial Molar Pregnancy.
BFP 11/14
My Pregnancy(ies) Blog
Yep. They are so much happier now. It's a joy to watch. Now, if only they'd sleep...
For me, on the one hand, time if flying by.
On the other hand, the newborn phase was really, really hard for me and I'm definitely glad to have a baby that can interact. It's fun to watch them develop.
I dunno, my answer to your question depends on the day I think. FWIW, my LO isn't quick to hit milestones either. Crawled at 9.5 months, etc.
ETA - I know crawling isn't a milestone. You know what I mean.
One of the best days of my life was when DS became mobile and was able to entertain himself for 20 minutes.
I guess you could say that I won't be sad that he is growing up until he becomes a teenager and is filled with teen angst and is embarrassed by me.
She is sooo big! I think it also matters how "developed" they look. My DD still has "baby" hair so I don't feel like she is leaving babyhood anytime soon. But if my DD was walking by 10 months like some people's babies and had longer hair I'd be sadder.