Blue ricky, also known as the L-tetromino, or, J, in this specific rotation has no symmetry, but is a solid choice! First place!
Hero, or, straight tetromino, has vertical and horizontal reflection symmetry, and two-fold rotational symmetry. Also known as I. The piece every pro waits for. Second place
Rhode Island Z, or skew tetromino, or S has two-fold rotational symmetry only. The classic presentation of the piece! Third place!
Teewee, T-tetromino, or just a funky lil guy with a funky lil name: vertical reflection symmetry only. Amazing. Fourth place/
Orange ricky, also known as the L-tetromino, simply L, in this specific rotation has no symmetry. I can only assume this ranking is based on color. Fifth flace!
Nathaniel Garro was originally the battle-captain of the Death Guard Legion's 7th Great Company and later became the commander or Agentia Primus of a band of Space Marines gathered from all the Legions known as the Knights-Errant who remained loyal to the Emperor.
Cleveland Z, also known as skew tetromino, or Z, two-fold rotational symmetry only. Not names after a family guy character. Sixth place!
Zote the Mighty, a self-proclaimed "Knight of Great Renown", is an aspiring yet unfortunate and rather inept warrior. He is cantankerous, short-tempered, and gloomy, and seems to think highly of himself. He wields a shell-wood nail which he has named "Life Ender". Seventh place!
Smashboy, also known as square: vertical, horizontal, and diagonal reflection symmetry, and four-fold rotational symmetry. Also known as "o". He stole my oreos. Doesn't deserve to even enter into the ranking.