So I have caught up on Accel World.
As a rule I don't really like main characters with crippling self esteem issues.
It works here.
This isn't some guy that at least has totally average looks and so on. No, we have a short, fat guy whose two best friends are way above him in the social ladder and he knows it. Everyone knows it. They may have started out equal but as the years passed by he felt himself growing further and further apart from them, because he plain wasn't good enough. So yeah, that's a genuinely good reason to not feel good about yourself.
His character development has come across quite nicely. The issues are there, but he is willing to take a stand.
The fact that he and the main girl cut to the chase right from the start is also quite good.
Animation is decent enough. Plot is engaging. The avatar designs could be better though. Solid series overall.