Nobody can deny the popularity of customization within games. The market is huge, whether people are camouflaging their favorite gun or a piece of clothing for their toon.
The more players get involved, especially with games which have strong character progress and customization, the more players become invested in that character and will want that character to reflect their personality.
I will suport developers who do not go this route.
I miss games that let me customize everything just because. Just for the fun of it.
This is what they did with Virtua Fighter. You had to but customization features for each character. What kind of crap is that?