I have 3 or 4 Tagtool gigs coming up (e.g. at this year's Reeperbahnfestival), so I thought it to be a good idea to do some practise (no projector connected, I just document it via Vine, and that's it). The fact is, I barely use any other iPad-Painting-App at the moment, since I feel kinda bored with static art these days.
But here's another reason I am drawn into Tagtool: its interface. The way you interact with Tagtool (to me) is essentially different to all other painting apps out there. It doesn't emulate any pick-a-brush and dip-it-into-color behaviour. It doesn't resemble matter-based creation at all, at least not in any way that I'd known of, so what happens here is: it rewires my brain in terms of how to create artwork using data and light.
I <3 that.