It`s easier to create out of a negative emotion than a positive. Tjis is the nature of the term "tragic artsist", but I think it is true. A track made out of love or joy, is very hard to not sound twee.
But hate, anger and pain, are strong creative catalysts.

I generally go for a strong mood, either way, the kick and bass move the most air, and can have the most physical effect on you, so I generally start here too. Alhtough I guess I write from a Rig engineers perspective, so I go for certain frequencies that generally are hot spots on a system.
Sometimes I will start without the kick altogether, as when you get a really good percussion loop going, when you bung in a kick it just locks in nice.