Music affects the mood the game has. If its dark, the played might feel bored or even depressed, get it too fast and youll tire the player even if the tune is good. I´m not sure, but I think Stronghold was the first game that used different music for different scenarios. When theres no military action, this nice music adds to the positive feeling of the game.
I must say, I was somewhat not very optimistic about SH2 music, it was different, first one definitely rocked and I learned everything there was.
Music affects you, if this is "10%", then these cents are very important. The game has to have everything good to outstanding, it will last very long if there is no area that is lacking.
SH1 set the speech and sound standard high, the second one dropped it, everyone expects to never go below the set standard and if possible, make it better. I wasnt really happy with SHC music, but it wasnt bad.
Just compare how peasants react to you in SH1 and SH2. I liked church where it wrote about those to get married

so much fun, it was mostly lightherted humor, even when you didnt burst in laughter, it was something that kept you in the game and brought it feeling which many games ... lack. The feeling was definitely positive. SH2 graphics and mood were dark, the mood was much more serious, the peasants were no longer fun imho. Quality voice acting in SH2 I think wasnt present, or I might be blinded by other negatives
