Some people think that Ulq r2 is uber strong but i think is not:) Ichigo was uber weak (comparing to the strongest captains, espada) that time when he fight him thats all. Btw Aizen dont need to know about R2, if you are powerfull, you are powerfull without any release if you are weak you can...
I think you dont need much strenght if u need to beat someone brainless even if he's 5 time stronger..Ichigo full hollow form is something like Wonderweiss.Nevermind i go for Stark this time :P
I think master with simple katana can kill a novice with sameheda, sword isnt strong sword its just a tool. But when we talk about the look i go for Hiramekarei :)
Speed is nothing compared to time. 500 mach speed? 1000 mach speed? who care it can be even 5000 mach but if you can slow down time it will be slow if you wish. End of story.
Yama have a good reason to not use his full power in FKT. Those pillars was prapobly enough to kill Aizen, but his full power would destroy the barrier and the whole human world.
Zanpaktou power is a mirror image of user power. Yamamotos RJ is so strong because Yamamoto is so strong.Yama-ji is the source of RJ power. I think its not like - You are more poweful because you have better zanpaktou. Btw i think even if ichigo have more power then Yama he dont have experience...
1 Yamamoto - im unable to imagine what he can do
2 Aizen - Hypnosis is incredibly effective in battle
3 Shinsui -In bankai he can prapobly defeat Aizen
4 Urahara - Genius
5 Kurosaki Senior - He's damn strong even without shikai
6 Yoruichi, Ukitake - Just because.
7 Ichigonator...
I Remember when Yama train kendo with Ken - old man kick his ass with wooden sword (bokken) so much...that was the firs time i saw Ken scared xD almost with tears in his eyes. But when he fight with his best students he use shi kai and they dont die - this is a real deal :)