Starlight's my favourite show but I can totally appreciate how some people can't stand it. Yes, it's innovative, original, great music, characters, spectacular. But, depending on production, the plot is likely to be paper-thin, resulting in poorly drawn characters, random motivation, too much spectacle and not enough story. Also people who know little about the show often have negative misconceptions, fuelled by arrogant reviewers.
And some people just do not like big flashy shows, they'd rather watch something small and intimate. Or a historical epic like Les Miserables. Or something traditional like Oklahoma, without the rock and noise levels and bisexual principal characters.