I saw one for manga, but not anime, so I figured why not? What anime are your favorites? It does not have to be just titles, but genres, characters, mecha, mascots, merchandise, staff, and the likes! I'll start off this topic with all the anime I haven given a 10/10 over the years (fav to least fav):
I'd post mechs, but I have like twenty lists. Instead, here are my favorite monsters of the week! Since this is a lot shorter I will not spoiler it.
Demon Tribe (Devilman): Magdora
Mechanical Beasts (Mazinger Z): Harkenshoot X9
Ghost Mechanical Beasts (Mazinger Z): Poses Omicron 2
Panther Warriors (Cutey Honey): Sea Panther
Mechasauruses (Getter Robo): Giro
Warrior Beasts (Great Mazinger): Gunser
Mecha Oni (Getter Robo G): Mecha Ironclad Oni
Fossil Beasts (Brave Raideen): Drozden
Colossal Monsters (Brave Raideen): Gigar
Saucer Beasts (UFO Robo Grendizer): Buibui
Vega Monsters (UFO Robo Grendizer): Jigajiga
Haniwa Phantoms (Steel Jeeg): Gakki
Monster Slaves (Super Electromagnetic Robot Combatler V): Alpha
Magma Beasts (Super Electromagnetic Robot Combatler V): Mammoth
Beast Fighters (Super Electromagnetic Machine Voltes V): Kanigan
Super Beast Fighters (Super Electromagnetic Machine Voltes V): Kamagurira
Mecha Boosts (Invincible Super Man Zambot 3): Tracid
Battle Robots (Battle Commander Daimos): Grangeiru
Mecha Warriors (Battle Commander Daimos): Daldasu
Megaborg (Invincible Steel Man Daitarn 3): Beltory
Heavy Mobile Mecha (Space Runaway Ideon): Galbo Jik
S-1 Robots (Space Warrior Baldios): Jolern
Connection Robots (Galaxy Cyclone Braiger): Avenger
Deathblack Beastmen (Beast King Golion): Kauman
Mechablack Beastmen (Beast King Golion): Ypsilon
Gyandlar Commanders (Machine Robo: Revenge of Cronos): Clubine
Zoanoids (Guyver: Biobooster Armor): Enzyme
Geister Robos (Brave Exkaiser): Shuttle Lander
Mecha Beasts (Brave of The Sun Fighbird): Anomeras
Combat Troopers (Brave Fighter of Legend Da-Garn): Erbenroy
Armored Beasts (Brave Fighter of Legend Da-Garn): Gracie
Killer Dolls (Brave Fighter of Legend Da-Garn): Albernie
Underworld Mecha (Brave Express Might Gaine): Guyaton
Unlawful Monsters (Brave Police J-Decker): God Whale
Walzc Gears (Brave of Gold Goldran): Biskvito
Angels (Neon Genesis Evangelion): Zeruel
Sargoss Prisoners (Brave Command Dgawon): Zelma Seijin
Zondars (The King of Braves: GaoGaiGar): EI-21
Primevals (The King of Braves: GaoGaiGar): ZX-05
Kyoshin (Neo Ranga): Akasa
Memories (Big O): Big Duo
Devil Beasts (The Devil Lady): Faces
Heterodyne (Dai-Guard): Ice Type
Machine Beasts (Gear Fighter Dendoh): Tangil
Machine Professionals (Gear Figher Dendoh): Bias
Heavy Beasts (Gear Fighter Dendoh): Diver
Dollems (RahXephon): Obbligato
Zeravire (Gravion): Duel
Festum (Fafner in The Azure): Parent Pleidaes Type
Mimetic Beasts (Godannar!!): Type 16
Cherubim (Genesis of Aquarion): Iskuron
Secrets (Eureka Seven AO): Deep Sea Type
Alones (Vividred Operation): Dumbbell Type
Real shame anime these days rarely use monsters of the week. There are plenty of regular anime monsters, so I'll list my favorites of those too! (this is a giant monster board after all).