why change shifter bushings??

Hello folks,

A general question to get some valuable feedback/ideas:

Why would one want to change shifter bushings? I guess i am asking this
because i want to eliminate the "not-exactness" of the change of gears
and/or decrease the effort to put it in a specific gear and/or just make
it feel more easy to change gears and make it as much fun to drive as a
friend's Accord (the gearbox feels less "bony" and much more sporty/easy
in his).

Thanks in advance,