I think in an ideal world I wouldn't stay at home full time - would like to return to work part-time.
I went back to work full-time after my first with the intention of taking a career break when no. 2 arrived (could have taken up to 2 years off). However, no. 2 didn't arrive as quickly as planned - not until dd was about to start school. The logistics of dropping one child at a nursery and another at some sort of before and after school care were off-putting. Most child minders only work 8-6, I was looking at up to an hours commute each way so fitting in full days work would have been tricky. In addition, the costs of childcare for 2 would not have left much over each month when you include the costs involved in working - petrol, smart clothes, lunches (never would have time to make my own!) plus I had decided I would have had to get a cleaner for a few hours each week to save my sanity...
So I never went back and became a sahm instead.
I have since had a third child and as childcare has got even more expensive (£850 for a full time nursery place here) I can't see that I will go back to work until the youngest is at school at least.
In hindsight, I think I would still be working if I had gone back only part-time after my first. although I would probably have just been working to keep the job open rather than making much money - working part-time you have most of the expenses but less income. I also felt at the time that my employers wouldn't have hired anyone to cover the time I was at home so I would have had to fit 5 days work into 3, for example. But I do think now that it is easier to get flexible working hours from an existing employer, rather than try to find a new job with hours to suit.
I do feel quite strongly about raising my kids myself and did have qualms (sp?) about working full time when dd was little. But I would not necessarily feel that I need to do 100% of the caring - not everyone is suited to being at home full-time and I think it is better for your kids to have a happy mother who works than a miserable one who is always at home.
I have enjoyed my time at home - I am lucky to live in a bustling town with lots to do - would possibly feel different if I lived in an isolated rural area- but am now getting to the stage of planning to return to work. However, my kids have got used to me picking them up from school, taking them to various activites, etc, and I would love to be able to continue this. So ideally I would like a job that is term-time, school hours only, pays enough to make the extra stress on the family worthwhile and is stimulating and interesting. I don't think such a job exists!