Will rate my 30 best or worst liveries. 1 being best, 30 being worst.
These are just ones ive known of.
15. Northern WTYPE (you know, the old red one that 317s had)
I don't know which you mean, as there have been several variants over the years and Northern never had 317s! 317s did make it in service to Leeds when the Mk4s were all stopped after the Sandy derailment, but that was under BR. I'm going to guess that you mean the 321s, which carried a red version of the standard Northern livery which was later applied to 333s, they are now the only units that carry it.
In my original post I didn't go into historic liveries so I'll do that now:
GOOD: Large-logo blue, WYPTE Verona green and cream (141s only), GMPTE orange/brown (142s, 303s, Bury 504s), Jaffa Cake, Valley Lines red/green.
BAD: WYPTE "raspberry ripple" (both versions), Centro green, T&W PTE.