I usually make templates and poses from scratch when I have to include them in my comic. For important characters, I usually have a box with the different poses and views (which speeds up the process, since I don't have to re-shade them when I copy them into my comic). For example, Stephen Mask (this template appears to be ugly compared to my new template of him, which I have yet to include in any comic):



I do not usually copy features from a characters to an other, but I tend to have eyes ready for less important characters.