Concept = Good. Skill = Necessary.
Great concept: I loved the Leeroy Jenkins movie, and I love Halo.
However, it was poorly executed.
The voice acting was amature, the script should be redone, and while the drawings certainly weren't bad (much better than anything I could do); there simply wasn't any motion in the first half of the movie, and the second half was essentially him running into the base and his teammates getting fragged.
Also, the Leeroy battle shout should have just been the original voice acting (Leeroy FTW!) cut and pasted into the movie.
Great concept, but it needs some work. And by some, I mean a lot.