I've not regretted it ever. I am still 'me', have still got my identity, just one more, as I was already someone's wife, daughter, sister, cousin, colleague and have just added 'mother' to the collection!
Once DS1 started at Playgroup, I took on being Secretary and have helped run the place for the last four years as a volunteer. But because of that voluntary work, I've now got three, small, paid jobs which I can do from home when the DSs are at school, but holidays etc can be worked around.
I love the flexibility of being at home and don't have the worries of when the DSs are ill or have hospital appointments etc.
Financially, it hasn't been easy, but we have budgeted very carefully and do without some luxuries which others would consider essential, but, on balance, I'm very glad to have spent these last seven years with my children.