The Dagobah set with it's huge tree roots and the unearthly mists was very fantasy inspired and I've never had a problem with the reptiles and lizards, Star Wars has human beings in it after all.

As for sabre colours it's a matter of personal taste.

Some people see varying degrees of symbolism in the colours (something Lucas started by giving red blades to only the bad guys).

It's in the nature of this thread to discuss these changes to a degree but only if the rationale behind the colour change radically impacts on the story.

Changing Dooku from a Sith Lord to a Jedi who no longer trusts the Senate or the Council is a story shift that can be underlined by a sabre colour change for example.

This thread is about making changes so if you are happy with the films as they are don't get upset by the contents of this thread (the original versions still exist and sit on your DVD shelf).