Stuff to steer clear of? Most of this will require research on the net for other user's experiences. It also helps if you can go to a store and look at the laptop in person before buying online or wherever.
Flimsy lcd mounting brackets, some models break easily.
Poor battery quality and lifespan.
Special keys on keyboard that are useless? Some new laptops also don't have the Windows key, which I find useful.
Touchpad mouse surface may be over or under sensitive. Also, mouse buttons may be stiffer on some models.
Built in wireless is nice, but depends on where antenna is located and how you hold and use the laptop.
USB and PCMCIA slot location is important if you use wireless PCMCIA card, or USB devices like flash drives. They will stick out a bit, and you don't want it to make using your laptop a pain...