I want to choose a Mega Pokemon for my team, but I'm having a hard time deciding who should get the spot.

I want the Mega to go to a Pokemon that I actually have a special connection with instead of just using it for competitive purposes

>Blastoise, my first ever pokemon and oldest bro
>Scizor, Houndoom, and Tyyranitar, who were all some of my favorite designs as a kid
>Aggron, who was also a favorite but now has the chance to actually be usable
>Gyrados, who passed me by the first go around but wormed his way into my heart come the physical/special split in gen 4

So who should be my Mega /vp/?