blueinstyle

Options include showing comments from specific categories, or excluding categories.
Exclude users from comment list by email address.
Uses a template to display comments exactly the way you want.
Limit amount of words or characters to display in each comment.
Include user’s Gravatar or Facebook avatar in comment list.
Create unlimited comment lists each with their own unique settings and options.
Support and Feature requests are on my forums at http://justmyecho.com/forums/

Customized Recent Comments

Display recent comments on your blog with complete control over the layout and format of comments.

Corey Salzano

This plugin creates a widget similar to the default recent comments widget. Instead of the format “username on post title,” the widget will display “username said comment excerpt.”
Choose whether or not to include admin user comments.
Customize the character length of the comment excerpt.

Customized Recent Comments vs Recent Comments Widget with Excerpts