I actually like both names, and when posting a measage or doing a review to a fã fiction or fã art, I do tend to switch names now and then. Anyways as far as personality goes I like Eugene a lot better because Eugene is so caring,loving, Valente and rommantic. Flynn only cares about himself and no body else, and is very selfish and way too sure of himself. The only part of Flynn I like is the name and can be very funny at times.The part of Eugene I amor is his amor for Rapunzel and his courgous side. "You were my new dream" that was so sweet and rommantic!
I like that name actually it sounds mais modern that Flynn which sounds mais like a surname.Plus he was cocky when he was going as Flynn Rider. ‘why don’t you take your frog and the pan back to the tower and forget about the deal’ and when he was Eugene ‘you were my new dream. He was mais nicer.(Beast anyone meets Aladdin).
I think they chose the name because it is an awkward fit for his character. If he had been named something like Philip, Eric, John, (etc) it wouldn't have had the same effect. The name is meant to catch you off guard, like "what?! his name is what?!" I think it's quite funny ;P
Flynn sounds resfriador, refrigerador but Eugene change was supposed to be a way to show the audience that Flynn/Eugene changed from a cocky thief to the sweet "you were my new dream" guy. P/S: Did you know that Flynn was named after Errol Flynn?