Hi PP,
just wanted to add my 2 cents worth,
DP has his own business so all things being equal I should be a full time SAHM. So I will have a choice. I want to be a SAHM because I want to raise my son & watch him develop. Lucky for me DP agrees In saying that I do think it is important that he goes to cc because when they go to school it is expected that they are able to socialise & know about routines. Yes you child can experience this in other ways but cc is a great way as well.
ATM I wouldn't put him into cc until he is about 3/4 but if I have another one I think I would like the break & some one on one time as other people have mentioned.
I also think cc helps with immunity, yes they do bring home colds but it helps to build their immunity up. If it becomes an issue you could always pull her out & put her in at summer when it shouldn't be so bad...
I have had friends who's children only went 1 day a week & those children had trouble adjusting because they forgot they would be going but each child is individual so your DD might love it.

HTH
BTW how did she go??