[answerheck]

Lots of faves, for various reasons, such as:

1. Comfort reading/nostalgia/guaranteed satisfaction (e.g. Mark Twain, Joseph Conrad, some of the SF greats)

2. Knowing there's more in there to absorb that I didn't get last time or have forgotten (e.g. various Neal Stephenson doorstops, biographies, history books)

3. Suspicion I didn't "get it" the first time and might appreciate it more now (e.g. not a personal example, but good summary - the famous line that "You read Don Quixote three times in your life. The first time it makes you laugh. The second time it makes you think. And the third time it makes you cry.". My personal example would be Code Complete!)

4. Plus, this being HN, straight technical books, which I reread to refresh and improve skils

The last book I reread was Kerouac's Desolation Angels, which actually for me was an interesting mix between categories 1 and 3.