I don't really have an interest in an independent Catalonia. I was independentist when I was 15, 16, that's the usual age when you feel most reivindicative. But since then I have changed my views, I have grown up. Are you asking me if I'd like Catalonia to be another Andorra? Then no. I think it benefits us to be a part of Spain and we share the language, culture and history with them. Of course there are many rifts amongst us, and there is also a very irrational and ignorant hatred from some Spaniards towards Catalans which is sad and causes a lot of friction.
That's why most Catalans react wanting the independence. Also the financial autonomy has always been a significative point of debate as many Catalans feel they are robbed. Would we be better off separated? I'm not sure. I don't believe in flags, nations or frontiers anyway.
If you want to make the most radical independentist out of a moderate Catalan, place him in the main square of a random Castilian town and drop the word "Catalonia".
Catalonia might share the language with the rest of Spain, but that language is not the original language of Catalonia, but an imposed one. Which brings us to history and culture... shared in part, yes, but Catalonia has many particularities which do warrant a sense of self-assertion.
I say do like in Quebec or Scotland and let Catalans decide in a referendum.