TwoSix
Everyone's literal second-favorite poster
It's interesting...most people seem to espouse a kind of dynamism, where the character can be shaped according to the needs of the narrative; but D&D maintains the 20 level paradigm of classes which is almost directly opposed to that need.Oh no, planning your build in as advance is is in my opinion the worst of both worlds (I suppose to someone else it might be the best of both.) You have to make all the same build choices as you would in the character building style, but they’re all front-loaded and locked-in once made as in the fixed growth style. Where to me the advantage of fixed growth is its ease of use thanks to very few decision points, and the advantage of character building is getting to tweak your chars as you go in response to in-game developments you didn’t anticipate during character creation.
To answer the question though, I prefer character building - as long as you have the ability to make those build choices as you go without risking screwing yourself over.
Being able to make choices within a class stricture seems to point towards a narrative of "you can bend your destiny but you can't re-invent or break out of it", which does seem in line with lots of fantasy tropes.