I enjoy Catelyn's chapters the most in AGOT because she is the most complicated character. She can be very intelligent - like when she realises that the Looking Glass means see better, and really stupid like going to King's Landing to find out who used the knife (and revealing herself to the Tyroshi galley captain). She can be really noble but also a complete bitch (ask John). She seems to be under tremendous pressure being the only Southron lady in Winterfell amongst such a singular family and that is only intensified during the book. Some of the decisions she makes are absolutely massive in the grand scheme of things.