Reread - worth it. Only skimmed through it since it was a re-read....well remembered.
If you want a rich, modernist epic that infuses cinematic forms and mythological references into a day in the life of an anti-hero but don't want to kill yourself with Ulysses, try Under the Volcano. You won't die. You'll just get headaches, in a good way.
The thing that most sticks out in my mind from this book was the observation that we often fall in love with who we want a person to be instead of who they really are.