As I sort of hinted at last Saturday, I think a lot of the reason I find mashups interesting and worth listening to is that a good one can make me like a song I previously hated.1 There's one mash-up out there that actually sort of makes me feel warmly about Journey. (You're not going to find it at PATSP, though, because anything with that kind of destructive potential needs to be tightly restricted. Obviously.)
I didn't necessarily hate Leona Lewis, but the song sounded kinda dumb to me the first time I heard it. And it didn't help that I misheard "keep bleeding" as "keep breathing," the first time, which was just confusing.2 Put her in front of a Depeche Mode song I already really liked, though, and suddenly I like the lyrics just fine. So I'm forced to conclude that I'm mostly interested in the particular palette of instruments playing behind the singer, not what he or she is saying, even though I'd always thought I mostly cared about the words. Better to find this out sooner rather than later, I suppose.
1 Or at least that's the right-brain reason: the left-brain reason is that I am continually amazed that pop music is so interchangeable, that so many songs change chords at the same moments, that so many have the same structure, that it's all so homogeneous. Even songs that sound like they have weird chord progressions, like Nirvana's "Lithium" or Beyonce's "Single Ladies," seem to fit right in with everything else. Somehow, this manages to surprise me every time.
2 I also heard "Baby, this time I'll be bulletproof," in La Roux's "Bulletproof," as "Maybe this time I'll be bulletproof," which changing that one consonant sound makes it a very different, and much more depressing, song. In my defense, I don't think she's enunciating very well.
I also always mishear Bon Jovi's "Livin' on a Prayer," though: I always hear "It doesn't make a difference if we make it or not" as "It doesn't make a difference if we're naked or not." That's the only reason I like the song at all, and it makes no sense unless you know how I'm interpreting that line.