I've always rather liked Ishida's shyness...helped offset his superiority complex(which, as we learn when his father shows up, really isnt what it seems) I've always thought the pushing his glasses up was his way of going "eep! personal! might reveal i'm not a jerk! hide!"

Bleach reminded me a lot of SDK when I first started it, too(which is why it's one of the first things i always thought of anytime the subject of reccing something to you came up) the characters are just more obviously nice from the start.