I have heard, and "sight-read around with" a few Thalberg pieces and I actually find him a little difficult to get into. At first I anticipated a natural inclination towards his music because I thought, at the time, that I am "made" for Romantic piano "salon" music like Thalberg, Pixis, Herz, Tausig, Rosenthal, Hummel (well, ok, he's a little pre-Romantic), Czerny (same), and even Liszt, but really I found it mostly doesn't do a whole lot for me. Maybe I'm just not listening to the right pianists. Would you recommend anyone in particular for Thalberg, thalbergmad? I can't quite put my finger on it, but there's just something about the music that leaves me a little unsatisfied. I'd rather stick with Liszt!
On the other hand, I've only heard and seen his operatic fantasies. How about his original compositions? I believe there is a piece by Thalberg called "Un soupir, Melodie variee pour piano" which I happen to like a lot, but otherwise I haven't heard much!