The answer to "thank you"

As a response to “thank you”, I prefer “not at all” to “you are welcome”. The former sounds to me like “no really, it was no problem for me to do this which meant so much for you” while the latter sounds like “I am so gracious for having done this for you and I haven't even asked for anything in return (yet)!”.

Comments

For me, I use "You're

For me, I use "You're welcome" when I want to suggest I appreciate having being explicitly thanked. Otherwise I think I use "no problem!". :-)