In general , your goal is to convey information as clearly and concisely as possible. If you can do that and write in beautiful, poetic prose, then by all means go ahead. If you're not sure you can pull that off, then make sure the clarity is there before you add the poetry. If a sentence, however grammatically correct and gorgeous it may be, has to be read two or three times before it makes sense, then you haven't done your job. This emphasis on clarity may seem somewhat stronger in the sciences than in the humanities, but the best scientific writers do manage to write with considerable skill and, occasionally, real beauty.
Good writing is good writing, period.