I used to consider myself a pretty dedicated Bellow fan and read most everything by him. However, recently, I tried to re-read "Humboldt's Gift," and ran into serious problems getting to the end, although I did. I then took on "Henderson the Rain King," which I read when I was 17 or 18 and thought mighty fine. This time around, I found it appallingly bad. I don't think I got past page 25 or so. Odd though, I still like "Augie," and I'm sure some other of his books would still resonate for me, but I wonder if his reputation is already falling below the horizon.
Similar experience here. In the 1960s I avidly read the Bellows as they came out and thought them great, especially Herzog. In recent years, though, I've found them extraordinarily difficult to get into, with Seize the Day as a possible exception.