As others have already pointed out, the author does not seem to command long sentences enough. But it can be a good choice for streams-of-consciousness; Marcel Proust is a good example of it. Here are his five longest sentences:

https://nathanbrixius.wordpress.com/2013/10/30/the-five-long...

In general, I'd recommend to read some Proust as his style is completely against the current trend of short, direct sentences à la Hemingway, and that can be refreshing!

By the way, I started reading Proust because of Nabokov's Lectures on Literature:

http://www.amazon.com/Lectures-Literature-Vladimir-Nabokov/d...

Which I recommend wholeheartedly.

It sounds pretty pretentious (and to some extent, it definitely is), but I've really enjoyed reading and re-reading some books with Vladimir Nabokov's lecture notes[0] guiding my own.

I'd love to get my hands on that copy of "The Lion the Witch and the Wardrobe" with David Foster Wallace's annotations shown in the header image! Great book, great author.

[0]: http://www.amazon.com/Lectures-Literature-Vladimir-Nabokov/d...