Which anime's opening/ending you like?

All the maison ikkoku openings/ends

Nanatsu no taizai (omg)
https://www.youtube.com/watch?v=kheMFtQJabQ

Tokyo ghoul
https://www.youtube.com/watch?v=lyFY196pNWI

Akame ga kill
https://www.youtube.com/watch?v=qQcVM4gi4D0

i always skip OP's/ED's. i'm not really into this.

Also almost all of the Jojo openings+endings.

Here you have it: all of the Full Metal Alchemist opnenings and ending! Loved avery single one of them!

You've listed one of my favorites, being Boku no Hero's second one.
Leaving out my Naruto list since I have so many favorite Naruto songs.
Here are some others from the top of my head (No Particular Order):