Agree mostly but want to add because I hope he reads these and decides to come back.
He had real voice actors, good story direction, I do think he put in the most work on the modding side of things to make his videos have the best possible animation, plus the amazing cinematography, and to top it all off he consistently put out two videos every single month. He really was the ultimate Skyrim creator.
Thankfully, it seems Ragneg is starting to do a bit better in the quality department, although nothing he has done so far really gets close to CHRS' newer stuff, in my opinion (except for maybe Chaurus Stowaway). And that's not to hate on Ragneg, but... Brelyna's Studies in Summoning looks better than anything anyone made (or I guess still makes) in SFM. Except it has much better quality story and cinematography. If he kept putting out videos like that twice a month, that release cadence plus the quality of the work would have taken him to the moon. Really unfortunate that he's gone, although it's still early and he can still make a return.