Charles Bukowski - American author

Hello i was wondering if I could get some help with a topic for a research paper. My general topic is Charles Bukowski, but now i must find a smaller topic about him that is:

1. Debatable
2. Plausible
3. Consequential

I chose Bukowski as my topic before I knew that I was going to be restricted to these three criteria. I am finding it very hard to come up with a topic and would appreciate any help that you guys can provide.