Also, "Taito" shows the readers which boy takes on the more 'dominant' role("Seme") and which one takes on the more 'submissive' role ("Uke"), in this case: Taichi - Seme; Yamato - Uke.
If the roles were reversed, the pairing would not be called "Taito", rather it would be called Yamachi.
Taichi and Yamato having a romantic relationship. Most of the time Taichi is the dominant one. Yamachi is when Yamato is the dominant one but both can be used to just describe Taichi and Yamato having a relationship.
It totally rawks!! If you don't like it you suck!
person2: "Oh not another yaoi fangirl...."
yaoi fangirl: OMG ^_____^ THERES A TAITO GAME? THATS SO HOT ^___________________^