It's funny how badly anime can affect you. XD

Examples:

Hetalia - you can't see countries the same way again

Naruto - ninjas would be a whole different meaning for you

Bleach - you can't think of the words 'bleach' and 'yukatas' the same way again

Fairy Tail - you can't think of the words 'guild,' 'magic,' 'dragon,' and the elements of nature the same way again

Boku no Pico - all of your innocence would be ripped away from you (or so I heard..)

Black Butler - it's impossible to think of the word 'butler' without thinking of Sebastian

Death Note - you can't look at someone writing in a black notebook... not like a normal person, anyways

OHSHC - a whole new meaning of hosts

Attack on Titan - TITANS.

I'm tired of continuing this list, so sorry if I miss out on an unpopular anime you really really like or something, okay?