2) He's flawed. But so are we all. That's the joy of humanity. Shatner/Kirk CARED. That counts for a lot.
I think you may be confusing Shatner with Kirk here. Shatner's performance was sure as hell flawed, as intensely enjoyable as it was to watch.
There's almost nothing about Kirk that's flawed. The guy's the quintessential boy scout. Which is fine because the whole device is that this guy is
too perfect. Which is what we lowly 20/21st centurians should be aspiring to.
Actually it just occurred to me that between that holier than thou character type and Shatner's performance, it's amazing anybody ever related to the guy at all.
The Shat's performance was special, if a little hammy. But the character and his portrayal of it aren't so complex and unique that nobody else could ever pull it off well.