Thoughtful responses to a Good Morning text?

Freya
The person I've been texting has a habit of sending "good morning" and "good night" texts. It's nice knowing you're on someome's mind. The thing is, I feel like my responses are terribly boring, and just lead to other stock questions and replies. "Captivating" someone, friend or otherwise, I think is pretty important.
 
I don't want to be overtly flirty- we're not at that point (or at least I'm not; so much awkward.) Something thoughtful or clever would be good. Or just interesting. Possibly mildly playful, if it's the right tone. 
Might you have an idea for how to go about this? I'd really appreciate it! 

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