Honestly, a somewhat playful humanist sans looks just fine in context, and a lot cleaner than many other trendy OS designs recently.
I think the word for all of this is kitsch.
A neutral font like Helvetica is a much better choice IMO.
That's probably also the reason why you think that it is meh.
compiz-fusion spins between desktop cube faces with ctrl+alt+arrow and a handy wacom tablet allow easy text selection, window placement and inkscape-driven thought-capture.
I'm very interested in striking a balance between a minimalist console and graphical thinking, and have become a big fan of tools like mscgen, graphviz, and inkscape.
Every time I use inkscape, default font selections irritate me to the point where I now generally the more tedious option of manually scribbling on the wacom tablet.
I think they did a bang up job with them, especially Cambria (If I never saw Times again I'd be happy).