Yeah, there's no right answer except that it's what works for you. Fiddle with it for a while, see if you can find your magic tilt. Then measure it with a level so you can duplicate it if you need to. I like very slightly nose down on the saddles I'm using now.

A good tilt can sometimes be found by setting the saddle level, using a level. Very few saddles are totally flat. If you have one, that's simple. If you don't, look and see where your sit bones live. Try to make it level just from that point forward. While riding along normally on the flat, it's regarded as a good thing if your can, while pedaling, briefly lift your hands off the bars without sliding forward, though balance has a lot to do with that too.