Personally,I think Flash is a nice guy.He was always eager to help the girls as much as he could.But I still having a hard time accepting that a man who suddenly appears without any backstory turns into Twilight's boyfrend.It's like one day your single mom suddenly brings back a strange man and tell you he's going to be your new dad.Even if you know he's a good gay, it's still hard for you to accept him.