Now that I've read the OP's second post, it's clear to me that he's new to audio.
We're going to in depth with the whole "Are loops good or bad?" thing.
LOOPS, like the one's that come standard in FL, ARE NOT ok to use and ARE NOT professional enough to make it big.
LOOPS YOU MAKE, from scratch or ones that are sliced, ARE ok to use and ARE professional enough to make it big.
So using presets in songs does not sound professional, if used incorrectly.