>What are some particular speedbumps you've hit in this area due to being a parent?

Time and privacy - as all are apparently saying ;-)

>Do your children know about your interests?

Yes, on an age-aprorpriate level

>If you had a choice would you mind one way or the other if your children were into BDSM when they got older? (Not with you, let's leave any incest out on this one please.)

No, and I would not mind if they did not, either. Their choice.

>If you are a sub, do you see raising your children as another act of being a good sub to your partner or do you take a different position/differentiate? Please describe your views of your position as a mother/father vs your position as a sub.

It is like that of a vanilla parent.

>If you are a dom, do you find your parenting style to be authoritarian? Please describe the differences in your treatment of your child vs your partner.

Being a switch I also dom - and to put it shortly, there is no similarity. Subs are not children!

Feel free to add any general thoughts you have on the topic, even if it isn't an answer to one of these Q's.

I would like to say that I personally think it important that the children are sufficiently orientated. First because they always sense something and may
imagine things that are not right if lacking general info.
Secondly because they accept the way the family functions as they way Families as such function, and this may set frozen gender roles and deprive them of choices.