1. seriously? having the intelligence to know your limits and to create a way to overcome your limits (in this case yama's stronger than aizen)is the same thing as fear? no its not the same, not even close, BUT yes i had forgot about his reaction to gin's ability,Aizen didn't fear Yamamoto's zanpaktou? Oh please dude. If he didn't fear it then he wouldn't have gone through the trouble of modifying Wonderweis. To acknowledge that something can defeat him goes hand in hand with fear. Death is fear. Aizen was horrified when he almost died at the hands of Gin. That's why the Hogyoku evolved him to a higher level. It's the same thing with Yamamoto. He would have died if he went up against Yamamoto and Ryuujin Jakka and he knew it. He modified Wonderweis as a precaution, and cautious of something is tantamount to being afraid, even a little.
Aizen wasn't that great in my opinion. He was way too smug about everything. Not to mention his God complex. He had that annoying high and mighty attitude like nothing ever surprised him. Even the most wicked villains need some expression U_U
I think the Quincy are going to be fantastic villains. I guess only time will tell
2. i disagree, and also he did admit to being inferior in intelligence to Kisuke, but i think his attitude was perfect.