I agree with iainsinclair, there is no single answer to that.. Moreover, there is not "right or wrong" in art.. And actually, defining art is quite a complicated matter in its own. We base our "judgement', our opinion, say if you like it or not, or if you play it this or that other way based on "taste". Which is already mentioned in old music treaties as giusto. But "taste" is not something immobile! It changes with time, and performance history shows us, that for example slow tempos in classical sonatas used to be played far slower some 50 years ago than now. Or the way Bach used to be played has also dramatically changed in the last years, after more treaties and historical informed practice have come to life!
However, personally for me, the important thing is to be true to oneself and to the music. Changing things in the score just to be "different".. I don't rate that very highly on my personal artistic scale- but that might be me. I believe there is a HUGE, really VAST amount of colours and possibilities in the music, being true to the score. Getting bit late now, and probably have written too much already!The important thing, is enjoying what you do, and share that with the audience,truthfully!