Affectionately calling a guy grumpy?

Me and my guy friend who are close were talking and he's always admitted that he can be grumpy. We were recently talking about a phone call we had where I was stressed and I said sorry if he thought I was annoyed with him. He said 'I have my grumpy moments' and went on to explain what he's like when he's grumpy. I said I knew because I used to see him with a 'grumpy little face'. I said it in a light hearted and affectionate way but is this a bad thing to say?
Affectionately calling a guy grumpy?
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