lol well let's see... it's SO subjective...
To me, it should have some sort of pleasing flavor/aroma. It should do its job. I would think of indicas as 'kind' (relaxing) and sativas as 'headies' (trippy, invigorating, creative), but it's all semantics! Then finally, and very important, it should have a smooth smoke- to get that, don't give much Nitrogen during flower, flush out the pots real well about 10 days before you expect to harvest, and actually allow the plant to turn a little yellow... then dry it properly and let it cure at least 2 weeks to get the best possible flavor out of it.