As soon as I read that you couldn't find any recordings where you felt an emotional connection to this music, I figured it must be how you're listening to it, as you then said

... Beauty is in the eye of the beholder.
The main thing that can go wrong for a listener is to be applying the wrong aesthetic. Measuring everything by the same yardstick, so to speak. You have to look at each style within it's own context. Which is easy to say, but when you aren't familiar with a style how do you know it's context?
Basically, it takes time. I know I've never instantly got into a certain style, it's always been a gradual progression, gaining momentum as I begin to connect... I mean, this stuff was written hundreds of years ago, not too much for us to easily relate to.
So just give it the chance and it will grow on you. Often I will one day listen to something I've heard a dozen times before, but suddenly something in me 'clicks' and I'm able to get right into it.
Barbosa's onto something as well; it helps to understand the context in which these works were created. Check out some documentaries, and read a biography or two. I have an easier time appreciating the music if I can imagine how Mozart might have once played it for an audience, the things he might have been going through while composing, the world he might have lived in. Let your imagination fill in the details.
Something else that comes to mind, is perhaps we sometimes listen to music with 'piano-ears'... Having the bias of our instrument, possibly thinking too much along the lines of what the hands may be doing. Try listening to non-piano music of these composers. Bach's cantatas and Mozarts symphonies continually blow me away, I often take ideas from non-piano music and apply it to the piano music, in playing and listening.
I hope you're able to develop an appreciation for this music, because it's beautiful stuff and you shouldn't miss out.