How to reply to "thank you"

[Mr.Vu]

I agree with this - and I find "no worries", if anything, even worse.

Is it really so rude? God, I have used it a lot. I might try other words.

[orangutan]

Maybe "rude" is an exaggeration, but I certainly don't find it polite. I realize, though that people who use it aren't intending to be impolite, so I kind of accommodate.

[Searching for language]

When my B&B guests say "Thank you for the wonderful breakfast" I generally say something like "You're very welcome" or "I'm glad you enjoyed it".

I think the only time "no problem" might be o.k. would be if someone drops a bunch of books/papers and a stranger helps to pick them up. If the person who dropped the items says "Thanks so much for helping" The "No problem" would in my opinion not be rude. I would still prefer "you're welcome" though.