Sir's never indicated that he has a problem with the pajama pants, so I'm thinking he's more or less okay with it. At least for now. While I don't think Sir would prefer me to wear a skirt or more likely, a nightshirt to bed, I do think he would just prefer me to be completely naked, wearing just my collar. Sir himself sleeps naked, or sometimes with just his underwear on. This only becomes an issue when we travel and stay with relatives/friends. I actually had to buy him some pajama bottoms because it's not polite to be in someone's living room on an air mattress in your underwear. Sir knows this of course, so he'd just sleep in his jeans. I don't want him to be uncomfortable! So if he does change my nighttime rule, I'd be well equipped for travelling, at least. He's made some passing comments previously about it - my sleeping naked becoming a rule (well before we moved in together). I do love my sleep clothes, though. Especially in the winter.
Only time, and Sir, will tell what happens!