You mentioned the "trolls" lawyer did not want a report. By hiring you for any amount, you can not be hired by anyone else on this case. They will sometimes hire multiple experts just to ensure they cannot be hired later by whomever they are suing.
That is a tough call. I personally feel like I can do business with people who I don't really like. I mean, I could see myself walking away from people that I absolutely HATE, but there's a lot of room for wiggle there.
The only thing I would insist on is that everythign be well documented. If someone asks me to change my methods in a way that does not jive, then I have a problem.