I have a lot of pet peeves...
P4A:
-Idiots mashing 5A from FULLSCREEN.
-Yus being stale with mixup. Overusing DP, slide special, and overhead special. Too easy to read and punish even with lag(unless it is 1-0 bars connection).
-Elizabeths thinking 5C/5D, DP, and Ziodyne will win them matches everytime. Expect Persona Breaks otherwise there people...
-Abusing only auto-dial A combos, pressure, and oki/vortex. No effort for reward.
-Teddies that can't do basic and advanced combos...
-Kanjis only using DP and J214A/B. Easy to wait and bait.
-Naotos getting punished for over relying on gun stance on raw(no traps, no 5D). Also raw machine gun or shotgun supers. Too easy to read.
-Mitsurus trying to do auto-combo from tip, Mabufudyne's hitbox, and overusing DP.
-Labrys players only relying on DP and AOA.
-Yosukes trying raw tentafoo, badly spaced shuriken special, and not moving away to prevent a raw garudyne from being punished.
-Akihikos doing obvious killrushes, 5C, and JC.
-Yukiko's 5A being 10 frame start up.
-Raw non-wakeup DP/reversal. Expect it blocked.
BB:
-Hazamas that can't play like men. Upback all day for days.
-Stylish mode for anyone.
-Mugen + OD...
-Unlimited Mu
-Noel's VAs
-1 frame start up, ID, and guardpoint.
General:
-Chicken Blocking
-Wasting burst on 1 hit.
Can't remember some others but these are clear ones for me.