Those saying Final Fantasy 13 was crap...Well, 6.11 million people most of whom may or may not agree with you will have an opinion either way. (4.42 mil for PS3; 1.69 mil for Xbox 360).
Source: http://www.vgchartz.com/worldtotals.php?name=Final Fantasy XII
Anyone who is saying each Final Fantasy game is a game in of itself, thus forth they have no emotional tie to the Final Fantasy series is lying to you. Yes, very few Final Fantasy games have had direct sequels and almost all are unique games in of themselves.
However, when people start SCREEDING, then you caught them. Individuals don't get pissed over what is not true, they start SCREEDING when you hit home and close to the heart. Thus, the use of caps implies they have a heavy emotional tie to the series.
Was Final Fantasy 13 worth all the fuss? It would not be if it wasn't for those who have irrational emotional ties to the Final Fantasy series coming on every Final Fantasy 13 thread and defending it as if someone was insulting their family honor. Seriously, it is okay to admit Final Fantasy 13 was sub-par compared to Final Fantasy 8 you will find common ground there. However, once you spit in the face of common wisdom, then that is when your neverending arguments on whether Final Fantasy 13 was a good JRPG in line with the quality we expect from a Final Fantasy game will ensue.