TDL, Very well! I haven't really had to craft definitions I can use for these words before, but I shall try my very best.
Broken: Something, be it a single object, strategy, or even maybe an archetype, that is strong to the point of becoming over-bearing, and has no true counters or answers to it. Usually, something that is considered "broken" in a metagame will either be heavily used by competitors to the point of exhaustion, or be decried by players for making a metagame unbalanced. In systems like Smogon's tier-list or YGO's semi-annual banlist, the metagame is regulated to make sure that broken strategies are either hindered or removed altogether.
Centralizing: An object existing in a metagame whose existence causes the rest of the metagame to have some sort of response to this object, or risk being at a marked disadvantage to those who do. However, as far as the metagame itself goes, the centralizing object usually by itself does not possess extraordinary power as to be unbalanced, but can rather be seen as a sort of standard for decks. The most common example of a centralizing object is a staple card, such as Pokemon Collector or Monster Reborn. (Things that are required for a deck to function to begin with, such as Energy cards or Land cards, don't fall into this category.)
Over-centralizing: Same as centralizing, but the presence of this object can be so overbearing that it can be regarded as overpowered or "broken". The earmark of what is and isn't over-centralizing is mostly opinion-based and is up for dispute, but objects that are over-centralizing are ones whose very existence effectively forces everyone else to either run it or try to have a response to it. Some examples of these objects are Mind Games Slowking (in an older Modified format), Excadrill in OU, and Chaos Emperor Dragon (in an older Advanced format). Note the examples I used are those which are accepted by nearly everyone as over-centralizing. Other examples, such as Luxray GL LV.X, Mewtwo-EX, and Legendary Six Samurai - Shi En, are disputable.
Over-powered: Something with enough power and/or influence in a metagame that has the potential to throw the metagame out of balance (or already has). The definition of what things are and aren't overpowered is VERY opinionated and needs to be approached with caution; what might seem overpowered to one person might seem very weak in comparison to another. However, something that is overpowered usually isn't overcentralizing (i.e. its very existences necessitates a response to it), but something that is over-centralizing is usually overpowered.
Unfair: Oh, wow. This one is difficult to define concretely, but something that is unfair is something regarded by a person or group of people to not be "healthy" for a metagame, and thus some sort of counter-measure needs to be taken for it. And examples for what is unfair are even vaguer still than examples of "overpowered" objects. It can be a specific object or strategy (such as Pokemon SP), or even a concept or idea (such as Pokemon's 'big basics metagame', or, even more familiar, the luck factor). Of course, not everyone agrees on what is unfair and what isn't. Most of it comes down to the person, but things like banlists and other regulations try to figure out what truly is unfair for a game.
Fun: The defining factor on how each person enjoys a game. Having fun is different for each person; that is, not everyone has fun playing a game the same way. Some people play to win, other people play for intriguing games, and still other people play for trolling purposes. All of the above can be considered "fun" for an individual - it all comes down to a person's own choice.
...If you need me to clarify, please, go ahead. The definitions for centralizing and over-centralizing were very tough for me to come up with, and I feel like I didn't explore the points sufficiently enough - yet I don't know what I'm missing.
TDL, Yeah, even with the later sagas, it feels a lot more kid friendly, which is why most people dislike it.
TDL, Sure brooo
TDL, +1
TDL, TCG Trader --> ShinyMew89 ---> The Power of Three ---> Teapot
I lost the game.
TDL, ....they're synonyms of cool story bro :<
im sorry TDL
TDL, SEACLOWN
Don't worry about the video. It's all done and ready to be uploaded.
TDL,
Nononno. Ask Afro-G the story behind my username. :3