[XCSme]

I like writing my own HTML/CSS from scratch because I am "picky" and don't like when, for example, a ThemeForest theme comes with jQuery and 10 other JS libraries only for a button to animate. Also, sometimes customizing a theme has a bit of a learning curve, so I don't save too much time compared to writing my own.

That being said, the best solution would be to:

1. Don't care, just use any theme that's good enough.

2. Always use the same theme, so you get familiar with it then you can easily customize it.