I found that Roger's "monologue" at the end of Part I really very emotional. It wasn't really "sweet", because their "hollywood love" isn't perfect (since it's an affair and everything). Nonetheless, I found Pynchon's writing really wonderful right there.
Now, I have a long long long history with Shakespeare's Hamlet, and it may have gone to my head. However, Slothrop's experiences on the Rivera made me think of Hamlet (eeek). Bloat and Tantivy really resemble Rosencrantz and Guildenstern. They are somewhat amusing, sometimes a bit dopey, and seem very innocent and used. Yet they are trying to get something from Slothrop, and he knows it. Furthermore, everyone calls Slothrop paranoid (implying crazy), which is rather like Hamlet. Like Hamlet, Slothrop knows there is something fishy (octopus, even) about the whole situation.
Disclaimer: And I don't necessarily think that it is significant that one part of the book resembled Hamlet...I'm not trying to make broad connections that have no validity. I was simply reminded of Hamlet.
I am tired right now...I hope that made sense.