I'm unable to take a compliment. Lately I've been getting more involved in art, something I've loved my whole life. I'm not bad, per say, but obviously improvements can always be made (that's the main reason I drawing something every day) Its impossible for me not to feel like an imposter, someone will comment on a picture (Literally just now I got a bunch of "wow!" And "that's amazing!" Comments on Facebook on my latest one) and I immediately think 'are they being sarcastic?' That's why I've been posting some stuff here on hubski, part of it is getting myself out there, trying to learn to take praise, and actually be proud of what I do. I still prefer when people tell me "its good but x is wrong/could be done better if you try like this". I'd rather people criticise my faults so I can improve than just outright compliment me.
Usually when you don't know how to respond to a compliment, they just want you to smile and say thank you. Criticism is great, but a couple months of no good news can be draining, so compliments are nice too. I think that constructive criticism in general is something that's always on the decline, but can only say that from what I've personally viewed. But you could add that even though you can't take a compliment, this has allowed you to not be too shy to vocalise your own constructive feedback.