Favorite move of each type

Normal:
Transform, get to peek at your opponents moveset and power up potentially. Its a great curveball. (Runner ups are Fake Out and Encore)

Fire:
Will-O-Wisp, burns attack cut has gotten me out of so many bad spots. Plus its fun to use with a guts partner if you dont have a flame orb lying around. (Runner up: Overheat and Flamewheel)

Water:
Surf, its a classic! The animation is pretty much always cool, its useful out of game and shows up on surprising 'mons. Looking at you Rhydon. (Runner up: Crabhammer)

Grass:
Giga Drain: I like recovery moves, especially when I am playing with restrictions on items and/or nuzlockes and this is one of the best ones. Lets you get a bit of damage in while you are at it. (Runner up: Leaf blade and Leech Seed)

Electric:
Shockwave: In my favorite animations of all time in Gen 3, this puts it ahead of Thunderbolt just by a bit though. (Runner ups: Thunderbolt and Thunderwave)

Rock:
Ancient Power: Neat animation, cool name and a fun gamble for stats. Bonus points for birthing one of my favorite comics: https://i.imgur.com/dTwjh.png (Runner up: Rock slide)

Ground:
Earthquake: Would be hard to pick another. Its strong, its widespread in the movepools and it looks pretty cool in most games. (Runner ups: Precipice Blades for the name honestly and Bonemerang which reallllly should be the one ground type move to hit flying types. Give it that niche Game Freak, cmon!

Ice:
Ice Shard: It might not show so far but I love priority moves and Ice Shard helps the typically slow ice types get some damage in right on time. (Runner ups: Blizzard and Aurora Beam)

Bug:
Bug Buzz: Good power, fun animation most of the time and the fun side effect of going through substitutes which everyone forgets about online. (Runner ups: Quiver Dance for making low tier Pokémon that I like a threat and U-turn for being so damn useful)

Psychic:
Trick: Its unique, it can have really fun uses and show up on Pokémon you dont expect. Ticks all the right boxes for me. (Runner ups: Mirror Coat and Psyshock)

Dark:
Snatch: It always catches people unaware and can really turn the tide on online battles. It can steal some surprising moves, like Wish. (Runner up: Sucker Punch)

Steel:
Heavy Slam: Its thematic and hits pretty hard and consistently. Helps fill out M-Aggron's movepool which is perfect for me. (Runner ups: Bullet punch and shift gear)

Ghost:
Shadow Sneak: Protean Kecleon's bread and butter. Great priority move, helps some of the slower ghosts that I like get the damage in when they need it. (Runner ups: Curse and Shadow Claw)

Dragon:
Draco Meteor: Hits hard, looks cool. That's what dragons are all about! (Runner up: Dragon Dance)

Fairy:
Draining Kiss: Self-recovery and decent damage. Simple and effective. (Runner up: Crafty Shield)

Flying:
Drill Peck: Shows up in some unexpected places, decent power and neat animations in some games. (Runner ups: Mirror move and Beak Blast)

Poison:
Toxic: Love to hate it. The move that has both saved me and ruined my runs in equal measure. (Runner ups: Coil and Gunk shot.)

Fighting:
Drain Punch: Similar to the above, I love a recovery move that deals damage. Helps out Life orb users so much. (Runner ups: Power Up punch for making Kecleon sweeps more possible and No Retreat.)