Thanks for the review, Darth. I know that people buy our stuff, but I sometimes wonder if anyone watches it! And although criticism isn't always pleasant, it's interesting to know what doesn't work as well as what does.
As for being hit-and-miss, Ralph and I made a couple of conscious decisions early on (as opposed to all the unconscious ones we've made) that may have contributed to that. First, we don't target our jokes to any particular audience. Depending on the situation, we'll use an obscure literary reference or a crude bodily noise or some combination of the two, knowing that not every listener will appreciate the humor but hoping that at least one will. We'd rather have something for everybody than everything for somebody and nothing for everybody else. Second, we abhor silence or - even worse - long stretches of unriffed original dialog. So - and let's just keep this between you and me, Darth - we'll occasionally include something that even we don't think is A-level material, figuring that a joke that may moderately amuse someone is better than Bela and Maria droning on unintelligibly about something we all saw in the previous episode, or 20 seconds of nothing happening at all. In fact, the "I am so white" song is an example of pure, unadulterated filler created out of desperation. Glad you liked it! Finally, we also try to vary our delivery. That may mean some riffs won't have the same energy as others, but I'd rather err on that side than project everything at the same level, which I feel gets monotonous quickly.
I hope that all didn't come across as too defensive. Although I don't think we'll be doing any more iRiffs for a while, I do plan to do more writing in a comedic vein, so I welcome the feedback. I thought you might appreciate some feedback on your feedback, because who doesn't love a feedback loop? And I won't even try to defend our Bela Lugosi impressions. We know we suck. Bluh.