I'm not sure if I posted here already but w/e. Gonna stick to stock beys. Just based on how much I like them, largely aesthetic. I'll try to do it for each series except for HMS where I'm still not clear on the release stuff so yeah.
MFB:
Uhhhhhhhhh...
4D: Phantom Orion B: D
Maximum Series: Screw Capricorne 90MF
Season 2: Gravity Perseus AD145WD
Season 1: Lightning L Drago 100HF
Metal System: Leone 145D
Some of these (LLD most dominantly) are a stretch.
HMS:
Jiraiya MS, Samurai Changer MS, Death Gargoyle MS.
Plastics: Had a lot of trouble choosing in places.
4-Layer: Spark Knight
S: Driger S, Dranzer S
F/2: Dragoon F, Wolborg 2
V: Cyber Dragoon, Dranzer V (thanks to Janstarblast)
V2: Everything except Draciel V2. Mainly Voltaic Ape and Burning Kerberous (esp the Black one), and maybe Blizzard Orthrus.
G: Driger G (esp the black one), Appolon G, Rapid
Steve Eagle G, White Gabriel G
GT: Dranzer GT, Dragoon GT