Of course, I love transcribing in general, I won't be able to transcribe Mark's songs without transcribing hundreds of songs from other artists. However, I'm more interested in "chord" songs, if that's a word, more than in pure technical fingerpicking tunes. I'm able to do that, though, I've played anything from Tommy Emmanuel's "Mighty Mouse" and "Jack Magic" (ridiculous songs in terms of complexity and difficulty level) to Chet Atkins' rendition of Ave Maria, which is more like a classical guitar piece, but relatively easy one. I even played genuine classical guitar pieces like Sevilla by Isaac Albéniz, many other tunes. So I have quite an affection with this instrument
I like Mark's songs, because they're extremely enjoyable to play, only assuming that you can sing, or at least mumble them through like I do. You know that Mark is not famous for his instrumental tunes, he's famous for songs and you just can't take the singing part off. For that reason, I don't care about "Money For Nothing" as just a riff, it's a song and you can only get the full joy of it if you learn it in full and sing it, not just playing the famous riff. And for the most part Mark's songs are easy to play, albeit having some extremely hard riffs sometimes, but also extremely logical and beautifully written.
I used to slow down the recording via various applications (Samplitude, Audacity, Logic, etc.), but by the time I developed my ears I almost don't care about slowing down anything anymore. In the older days people used to put coins on top of vinyl record to slow it down, by the way, I find it pretty funny.