Why is the very back seat of an airplane a poor choice?

I booked airline tickets this morning and selected my seat- the very last window seat at the back of the plane. I figured I could recline and not bother anyone and would have a pretty good view out the window. The plane is a Bombardier Q400 turboprop. I looked up the plane's seating chart on another website and it listed the back seats as poor seats but didn't say why. Does anyone here know why? There was only one other window seat available a couple of seats forward and am wondering if I need to call them to request a change. Thanks!