It was nice.
The voice acting for Jessi was really good it's just a shame about the mic. Also i get the impression Riley is really in touch with his feminine side. He has a slightly uk accent, he fusses about spilled redbull on a couch, and he refuses a girl to offering to go to the shower with him! Which is all fine by me, but the skull on his back seems a bit out of place. But i guess since the jacket doesn't go down to his waist ... never mind it does suit him :P.
The humor was good but the line "does that even compute" didn't do it for me. I imagined Riley going into an elaborately eloquent plea as to why not only to find jessi chasing a micky mouse head shaped helium gas filled balloon or somthing. Just my two cents.
BTW i get the impression you're rather unsure about your voice acting (- "if you think you can do a better job than this" -) but i swear it's completely fine, some of the better work i've heard around here so a better mic is all you need.