4 month late reply? Oh well x)
Yeah, Heaven's Feel is supposed to be played after Fate and UBW... they all build on eachother. I can see why you'd feel like that, it didn't really bother me though x)
Heard it was made by ex-Atlus staff recently, which makes me want to play it now. Maybe I'll find a larger memory stick and see if I can still get the digital copy off of PSN, assuming they still support that on PSP.
Well, KnK is pretty much the proto-type of Tsukihime but much better imo. I mean, it's up to you what you get into first of course but if you're looking for something a bit darker like F/Z, KnK is the way to go.
Indeed, the racing episode is still my favourite.