Making gamic can be a very challenging tasks especially, when you treat it like a art/creativity project. I would say, it's all in your mindset, to me making these is all about telling a story or a tale.
It's kinda different than, screenshots of your character leveling after defeating some boss mob - to certain extend it does involved some role playing that is if you are series in writing a good story based gamic.
There's 3 types of gamics I've identified so far,
1. One Panel series - Simple one panel usually suitable for joke, pranks and parody related to the game. Sample below

2. Short Tale Series - Tells a tale or joke in conversation style and usually there's no continuing episodes. One tales tells it all.

3. Story Based Series <-- this is the ultimate one and will take you far...sample below is just one of the episodes. There's more here

Part II - Coming soon...Stay Tuned