I remember maybe a little more than half of them, and perhaps 1/6 of them fundamentally changed my thinking enough that I'd be able to remember in detail (you can quiz me on them if you want an accurate sample). However, 1/6 of 150 books is still 25 books. There seem to be a bunch of people on this thread who would love to read 25 books/year, let alone remember them in detail.
For example, here's the list of books I read in 2005:
http://nostrademons.livejournal.com/83785.html#cutid1
I remember maybe a little more than half of them, and perhaps 1/6 of them fundamentally changed my thinking enough that I'd be able to remember in detail (you can quiz me on them if you want an accurate sample). However, 1/6 of 150 books is still 25 books. There seem to be a bunch of people on this thread who would love to read 25 books/year, let alone remember them in detail.