I think I'm in love with your accent. xD By the way, what settings are your smudging tool on? It seems to get a really nice effect, but mine just looks stupid.
It all comes down to personal preference, and considering Photoshop was made for editing photos originally, I prefer sai. Sai is just simple and easy, but if you plan on pursuing a professional career from digital painting, I'd suggest trying to learn how to paint in photoshop
i'd just like to get into digital drawing, 'cause i think it'll help me with using actual colors instead of just a nice, thin-leaded pencil and sketchbook, haha.
and you should do a hands and feet tutorial, 'cause i cant do them for crap unless i'm drawing from real life.