well the music are good in themselves, the problem is that they are not a lot of them (like you have one for cities, one or two for all dungeons, etc) and that they are the same we get in all dragon quest since forever. Imagine, you like some final fantasy music, now imagine all new final fantasy is just the same musics plastered everywhere, and without a lot of variety, again and again in every games... thats why people complain.
oh and also, apparently the guys that writed/orchestrated the music is a total jerk now, he is over strict with licencing, like when he agree to being registered its for a specific regional edition release of a game, and he dont even accept to be paid or anything to have the musics in another release or things like that, no he would only accept if it was to re-record everything for every version... and apparently if they cant even find someone else to do the musics for future games its because he have some specific contract about doing the music for dragon quest, but he also wont write new ones and thats why its always the sames, the guy is basically keeping the licence hostage
