I would like to happily point out the caption potential for these two photos combined.
Anyway, TFF holds a special place in my heart for being the movie that introduced me to the Trekverse. But if I look at it with anything more than sentimentality and rose-colored glasses, then I'm going to disappoint myself. I remember being completely blown away with TUC because it was leaps and bounds better than TFF, and as the years went on I found myself returning to TFF less and less. Now in hindsight of watching the rest of TOS and their films as well as XI, TFF doesn't quite hold up in comparison (okay, so there are the really horrible TOS episodes, but they didn't have the advantage of budget + time that a major motion picture would have). The two things that define Star Trek: camaraderie and space exploration, are basically thrown out the window with alarming ease.
usually a fan film means it has fanboyish elements, like the Enterprise taking on the Klingons, Romulans, and Tholians all at once, or it fulfills a fan's wish about certain characters, like you'd have Spock and Kirk have a romantic relationship or something.
Well, among other things we got:
-Kirk facing down a Bird of Prey (by the by, the same class of ship that ultimately destroyed the original Enterprise)
-Kirk facing down "God" by himself
-Kirk proving everyone wrong, repeatedly
-Kirk unbelievably scaling a mountain himself
-nude Uhura 20 years too late
As you note, Kirk is the main character of the series, it's just that all the other TOS films handled his character in much better ways while retaining his centrality. Hell, right before this he saved the whales and the Earth in a rather biblical fashion, and after TFF he manages to save the galaxy from interstellar war, but it was done so in such a way with such urgency and conviction that it didn't come across as self-serving fanwank for Kirk. The ironic thing is, in TFF he moves closer to the biblical sense (fighting God and paradise) while advancing galactic peace (with the big three national powers) -- essentially combining elements of IV and VI, and yet it seems to come up short and empty. In comparison, III had Kirk pulling off one of the most deftly swift maneuvers of improvisation ever -- blowing up the Enterprise while gambling to commandeer the enemy ship to escape from an exploding planet (my mind is also blown) -- and TFF seems like facing God is both a means of trying to one-up the past and yet somehow far less exciting.