Short answer: The game is awesome.
An extended answer at this time of night would not be plausible. I could talk about the graphics, storyline, revolutionary gameplay mechanics, etc. I will highlight the major reason why I like this game:
The player always win. Philosophically and literally, "games" are set up as contests where one person is meant to win/lose in a competitive environment. That is not the case with Big Rigs. You either win, or you choose not to compete; there are no LOSERS. Stellar Stone has defied the gaming status quo by establishing this unprecedented change as part of this game. No longer do we see a game where in order for one character to come out ahead, the other one must stay behind. The simply presupposed law of humanity vanishes as the "YOU'RE WINNER!" trophy appears on the screen. Thomas Hobbes once said that if every man had every material need fulfilled, the man would still fight his neighbor. Why? Vanity. Human nature. This way of looking at the "state of nature" has brought humanity wars and destruction. Through this game Stellar Stone has decided to establish the ideal situation: true altruism. And he has done it without taking out the competitive aspect. You just compete for the good of everyone, not just yourself; even if you think you are competing for yourself, you do not harm others in the process. The games takes a bold step in changing the very definition of "game" itself! It is a leader, not a follower It depicts the world we want. That is one of the reasons we admire this game.
I understand that change is hard. People/groups who advocate major change are often persecuted first and admired later. It may be years--possibly decades--before Stellar Stone's changes become mainstream. Time will decide if we are right. Unfortunately, due to the GAMING STATUS QUO that is supported by the propaganda of companies such as GAMESPOT, a lot of people may never be willing to even try Big Rigs. In fact, there have been a lot of trolls who bash the game, but they have not played it.
This does not mean that I do not enjoy games that are not like Big Rigs. We also like games that have tried to revolutionize the industry to a lesser extent (Shaq Fu, E.T., Michael Jackson's Moonwalker) to those that haven't but are still really good (F.E.A.R). In fact, we regularly host a F.E.A.R. Combat server. While we appreciate the graphics and gameplay, it is not in the same level as Big Rigs. We enjoy the game because we can play as a group, but at the end of the day (and lifetime) Big Rigs brings more inner satisfaction, in part because of the reason I stated above.
We have voluntarily chosen to expand the philosophy of the game through writing, art, forums, etc. For example, I wrote "The Gray Void" chapter in the Book of Rigism (the story expands on the Gray Void found in the game.) I can assure you that by now the people who have been here for years no longer see this game as a "joke." For us it is an unique view that successfully eliminates what we have defined as "LOSER," or, at least, it is something truly wonderful to behold.