Those are all good bans. I play diana so I know how scary she is. Olaf too. soraka is just a massive pain.
My personal bans are
,
, and
.
Jax: He is a perma ban for me until devourer is removed. I've only gone against the horror of it once and if I can help it I never will again. He died during a gank in the first 5 minutes or so and we didn't see him again until about 40 minutes in. We had two enemy inhibs down waiting on minions. top lane was pushed up to our base. A couple seconds later a tower was destroyed. three seconds later the inhib is gone. We backed before he got the the nexus turrets. He 1v5'ed our entire team for a penta and ended solo. Never again.
Vayne: It doesn't matter how hard she gets shit on in lane. She is going to come back and destroy your team. She is the nasus of bot lane. A feeding adc should not carry a game like that.
Veigar: Eh He's just fotm currently and his cage can be incredibly annoying. Oh and he can delete nearly anyone from a fight instantly. I like veigar too. I wish they didn't buff him a few patches back. It always sucks to ban a champion you enjoy playing.