Edited/Custom Sprites: Good or Bad?

[Grey_Wolf_Leader]

This is probably not a good thing to bring up, but I'm going to ask anyway because I need concrete answers.

Since (as my user title states) I am a novice still at spriting, that means that like most newbies I started out editing sprites that already exist. In fact, I'm still doing this almost exclusively since I am trying to perfect my spriting style.

I have a big project to create custom (i.e. edited) sprites in mind for a video game franchise that has been mostly untouched. However, after viewing a couple topics up here on the disscussion board, I realized that edited sprites seem to be frowned down upon by veteran spriters.

So my question is this: If a spriter decides to edit official sprites made by a video game company, in order to make "new" sprites for characters of a different franchise, is it okay to post them in the customs section if credit for the original company maker and sprite ripper is given like it is supposed to? (Oh, and also if the quality of the edited sprites is good enough? *Important thing to note*)