Sushi - hard isn't the word! I found it excruciating, having to go up to the computer after a 13-hour day with two very young children. However, I still think it was worth it, and I would do it again like a shot (though I'm glad they're at school now, so I can work during the day!)
I'm a freelance features writer, so I am lucky in that I was (am) able to do it all at home. During the school holidays, it's back to evenings and nights - but, again, I personally prefer that for all of us than putting them into holiday clubs/camps. I feel that I chose to have them, and they deserve to have a mother who's available for them (even though I am now largely redundant for anything other than sorting out squabbles, as they play together most of the time!)
As I say, most of my friends thought I was crazy when the children were little. However, I was totally confident that I was doing the right thing for us. DS did do two mornings a week at a lovely little nursery school when he was getting on for four; I deliberately kept him out of school until he was turning five (which meant that he missed most of Reception, as his birthday is in May!) I was told repeatedly that he'd suffer academically; in fact, he's still astronomically ahead of his classmates (though that's a whole other story).
He was undoubtedly less well socialised than his nursery-'educated' peers when he started school, and struggled at first with the whole separation thing. However, I asked the school to concentrate on helping him to bond with his classmates; it took a year or so, but now there's no difference between them.
Things were a bit different with DD. I wanted to have her at home instead of sending her to Reception (not least as she's a June birthday, so still isn't five yet); however, she objected (I think she wanted to copy Big Brother), and so I sent her part-time until after Christmas, and now she's full time. I'd gladly have her at home instead, though - despite the work issue!
I am now waffling terribly. I think if you're confident that you're doing the right thing, everyone else is entitled to think you're as crazy as they like. A nice group of people will always respect your choices, even if they don't agree with them.