I'm fairly font agnostic (when it comes to "normal" body text). The only time I care about a font is when an ebook tries to make it so I can't change it (body text, not special headers and such) if I want to. That's sooooo paper.
Given as how I use (and am quite happy with) my app's default font for reading (whatever it is), any embedded font that tries to override that default body text tends to jump out at me like a sore, ugly thumb.