I feel like Bobby's music is an acquired. It's not exactly divinely beautiful, but his music is very intimate. Schumann has a sort of element of speaking that might seem a bit boring, but one MUST listen to Schumann's "words" before they dismiss his music as garbage.
I'm not big on Mendelssohn, though I do like some string quartets and the piano trios.
As for the person who dismissed 250 years of music as garbage, sure Baroque music is nice, but really in the end, that's all it is: nice. I mean I like Baroque music, but I have yet to hear a Baroque piece that has absolutely blown me away.
As for Liszt, Liszt has the element of "showing off" that some people don't like, but hey, it earned him many lady fans. And as we know about those who criticize have lots of lady fans, they're just jealous =P. Just kidding. Well, I suppose if you really have something against show-offs, then that's your own problem.