Aren't those two different things? I'm going to count it as two different things.

Who I Am Most Like: Onada Sakamichi (Yowamushi Pedal)

An introvert who likes biking, anime, and has few friends, Onada is probably one of the most relatable characters to me. He even wears glasses! His personality is slightly reserved and he's a hard worker.

Who I Wish I Was Most Like:
Erwin Smith (Attack on Titan)

Confident, coolheaded, and a smart leader, Erwin Smith is the guy you want on your side. Whether he's in court or he's in battle, he'll think up of a plan for the best course of action, or manipulate things his way.

(Credit to Brilcrest for the beautiful art)

Honourable Menrions:

Who I'm Like:

Kousei Arima (Your Lie in April)

Hanji Zoë (Attack on Titan)

Who I Wish I Was Like:

Riza Hawkeye (Fullmetal Alchemist)

Koutarou Amon (Tokyo Ghoul)