Hello Helo! Welcome to the forums!
Don't worry about age around here, it's all relative - though I often get teased around the office for being 26, surrounded by ancient 30-somethings 
Yeah, I've noticed a rampent use of the term "fanboy" across these forums. To simplify things, I'll show the two most common instances....
* Situation A *
User1: Um, GalCiv2 crashes my system, formats my hard-drive, and gave me the Bird Flu.
User2: Works fine on my computer.
User1: Whatever Fanboy.
Sometimes, in a 'Situation A', the User1 just needs to update their drivers. Othertimes, there'll be something actually wrong in our code that is causing a problem on their machine that we (and User2) is experiencing. Either way, we can only hope that the User2 will give the player the benifit of the doubt and talk User1 through their problem...otherwise they risk being labeled a "Fanboy".
* Second Situation *
User1: OMG! I can't beleive you shipped the game with a Shift+P key to bring up the different pricing options on the selected style of ship for all the different colonies. I can't possibly play the game without this. Stardock SUX.
User2: Chill out, man. The game won editors choice awards without your suggestion...1.0 was fine, and they're just improving it.
User1: FANBOY!
Again, sometimes User1 is just venting and their 'vital' suggestion would really jsut be used by them. Othertimes we genuinely overlooked a 'easy-to imlement' feature that you benifit everyone and make the game easier to manage. Either way, unless User2 agrees with the opinion of User1, they're normally called a Fanboy.
You'll also find Trolls (forum posters looking for a fight), which is another iffy line between someone frustrated and writing a bit too angry, and someone that is genunely out to wage a vritual Jihad on the forum posters...but we'll save that for the next class 
Again, welcome to the forums, and if you have any suggestions or bugs, please post without fear...I'd say this is one of the most balanced and welcoming communities around 