Readers will easily tire of plain words. One of the biggest and most boring culprits is the word 'walk'. There are so many ways and styles of walking. Each of them convey a more detailed understanding of the characters state of mind. For instance, some characters meander, others stroll, and the really confident ones strut. Clumsy characters stumble, sneaky characters tiptoe, angry characters trudge, others sashay, stomp, trample, roam, lumber, hoof it, bounce, wander, trot... you get it--there are many words that easily replace 'walk.'