This is a great explanation of your vote value calculation. @energyaddict22 recently did a great post on strategies for people at different levels:
Steemit Strategies - Understanding Curation Rewards
He got my attention with this statement:

Curation Rewards are a rabbit hole within the rabbit hole that is Steemit. There are so many factors that go into the curation rewards of a normal post (not a comment) that even some of the brightest people I know on Steemit are a bit confused on how to maximize curation.

Thank you for this info @minnowbooster. It helps to understand your strategy.