i ain't a wicked person but the DS gives you more freedom unlike the LS. the DS is more like doing what u want to do whereas the lightside is more of doing things 4 people.(that is annoying now dont u think)_
anyhow all the people that did not betray revan in kotor 1 (bastila, HK-47, T3-M4,and Canderous) are in kotor 2
PS the dark side is a pathway 2 many abilities......