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Yes, the majority of the joints are tapered to tapered and no trouble to get decent results, its the internal corners, in particular with the sloped ceiling where I have had a bit of difficulty as it was my first time doing it and I am OCD perfectionist. It's going to turn out great, just taken a couple more coats and sanding than someone more skilful or experienced than myself would have required.
taping should be easy. Are you mating the tapered ends of the drywall? from the looks of it, you probably enough experience to know this... but drywall has a tapered end designed to be filled in by the tape and mud.