yeah, but you have to listen to C-3PO talk, and he complains about everything. and im sure Artoo would do as he's told...he did what luke wanted him to in ROTJ (aid in the escape, launch the saber). He just doesnt listen to threepio (i guess occasionally he doesnt listen to humans, AOTC he did this, but that was cause it was for the best, so he can help/rescue them)

Think of all that Artoo can do. He has some accessory/gadget for just about any situation, can pilot an X-Wing, always willing to go on an adventure (actually he seems to enjoy them and seek them out), and he's got a good sense of humor, and im sure there are countless other pluses ive not mentioned.

what more could you want in a droid