I don't know whether there is already a topic like that, if so, then I'm really sorry, but I couldn't find anything.
There are so many situations every day where I find myself thinking of Castle(the show)or about the characters. Different things that remind me of Castle:

my vocabulary list – especially at th moment, everything's about crime. When I read "observe" my mind immediately went to "Okay, Castle, but it's accompany and observe, not participate and annoy. Got it?"

songs – sometimes I listen to any song that reminds me of Caskett and sometimes I try to put there story into the text because I love this song so much.

In some situations I only want to roll my eyes like Beckett.

My English class and so many words. Especially "Always!"

Double Rainbows – Nathan Fillion!

I can't remember everything at the moment.

What things remind you of Castle, if you want to share!?

I get a little goose whenever I use the word "extraordinary".  And I try not to use it all that often to preserve its special meaning. 

Since English is not my mother tongue I don't use these words very often.
But sometimes I type an English sentence and suddenly realise how often I used "always" and I replace all of them because I know the deep meaning beyond them…