To be fair, Gandalf doing that to Bilbo did not have Bilbo agreeing. He was simply too polite to refuse 13 guests and then after hearing their plight and pretty much denying it, he acquiesced after they'd already left and regretted it near immediately. 

It actually irked me how Rand, Mat, and Perrin were still in denial of what they were doing after the first book, much less the 2nd and somewhat the third. I love [b]The Eye of the World[/b] because I felt like it was a lot of various fantasy adventures in one. I think after half the book, even a normal person wouldn't be in such denial like they were. [@0 Azzy 0]