I know what you mean. My thumb get tired having to move that extra inch down to the other keys. I heard that back in the 20th century, they had to get up out of the chair and hit pause and rewind on the actual Tivo itself.
edit: I just read that they didn't have Tivo yet. I guess they had to get up off the couch to switch to the HD channels from the SD ones and....
edit: never mind. The more I read about those days, it looks like they were probably too busy waiting in a gas line to watch much cable television.
Seriously, though,
I like the peanut shape, because, even if my hand has to move, I know just by feel where my thumb should be. Anybody remember the one minute that Apple came out with a completely round mouse? Uh, yeah, you had no idea which way was up. The peanut has just become like riding a bicycle for me, I don't have to look for any buttons. Not the ones I use anyway. Who is changing channels? What is that? I have no idea what channels the shows I watch are on, nor do I know what time or day they come on. I do know how to spell their titles and how to find them in a wish list, and how to use my 'now playing' to watch everything I need.