I think I probably qualify for this thread now. Speak up son!
When your co-workers are mostly your kids' ages, and they've noticed... and nobody ever says 'you don't look old enough for that' any more
I'm definitely getting to be a grumpy bastard, middle age has found me creaky, knackered and rattling like a chemist's shop. What I have left on top is a nice 50/50 blend of silver and black nowadays, though the beard's mostly black still. What I don't like is the encroaching baldy bits and the amount of daylight you can see through the rest. Especially when my youngest gleefully starts poking at new bits of scalp to make sure I'm aware of it. Cheeky little shit.