>blue
oddish, growlithe, primeape, scyther and electabuzz are all better than bellsprout, vulpix, persian and magmar. red sucks by comparison
>silver
skarmory is better than gligar. also, ho oh doesn't look as good as lugia on the cover
the lack of mareep in crystal also really annoys me
>ruby
this is a no brainer. groudon is arguably one of the best looking legendaries, ever.
no contest
emerald is the superior game, but i always found scott annoying, the bandanas uglier, and i can't shake the feeling that the entire thing feels like a fangame
>platinum
diamond and pearl are arguably the shittiest games in the series, no reason to pick them
>white
all of gen 5 sucks. i'll go with white because zekrom looks slightly less shitty than reshiram
>y
yveltal looks slightly better than xerneas, but subjective
>sun
solgaleo, buzzwole and kartana all look better than lunala, pheromosa and celesteela (with solgaleo being the best of the bunch)
>sword
zacian looks better than zamazenta, and stonjourner looks better than eiscue
>violet
most of the scarlet paradoxes look better, but koraidon looks like SHIT, so violet becomes mandatory for that alone