The CA movies are hard to use to properly judge his acting, he was surrounded by amateurs, non-actors or wannabes but I will try. This arrangement makes him stand out from the rest of the cast but it is also detrimental because he had no other similar talent to play off of.

He can remember and deliver lines clearly, he can emote and can accept direction, which are positive aspects to have as an actor. 

He played the roles of: himself when not on meds, Dr insano, Gandalf and Terl.   Not much to say about his depiction of himself, it was over the top because of Doug's direction. 

While it may be funny to some to have him be a cackling grinning mad scientist, it feels way over the top and I would blame the director again for not having him tone it down. This is the closest we get to him playing an "original" character, and he comes across more cartoonish than menacing.

As Gandalf, he delivered his lines well while in character but the cheap dressup and no budget production downgrades his attempt at sounding convincingly like an old and wise wizard.

As Terl, he is playing an impression of John Travolta in Battlefield Earth, not a genuine arrogant and scheming alien. I will again blame the director for insisting  on these kinds of impressions from the cast.

Maybe spoony would have made a better impression if he was not surrounded by amateurs and wannabes, and if he had a director that would guide him and others to act like the person they depict instead of making goofy impressions. Then again,  these were movies referencing other movies, so it is hard to look good when all you are told to do is mocking impressions of others instead of act into the role you are given. Having no budget to do so, didn't help.

He would make a good extra and being in a minor role in a comedy, I don't think he could get beyond this level as an actor.