What's the best text editor to use w html and css

This comes down to what your personal preference is, but the applications in which you can write your code is generally grouped into two categories:

Integrated Development Environments

IDEs are usually large applications, that come with a ton of bells and whistles, usually targeted towards enterprise level environment like testing tools, version-control settings, etc. Some people like to work in these because they like to have all their tools in one place, and don't want to have to worry about installing every needed tool that they may need as they go along.

Some notable IDEs:

Microsoft Visual Studio

JetBrain's WebStorm

Eclipse

NetBeans

Minimalist Text-Editors

Then there are minimalist text editors, that don't provide all the bells and whistles. The ones targeted towards programmers usually has some type of Package Manager or Extension Manager that allows you to install the tools and addons as you need them, and gives you more flexibility to create the development environment that works for you.

Some notable Minimalist Text-Editors:

GitHub's Atom

Adobe's Brackets

Notepad++

Sublime Text

Vi or Vim

For work, I generally use IDEs like Visual Studio and Oracle SQL Developer, while for my personal work I use Brackets.

There is no BEST. It's personal preference. If you're starting out I'd recommend Brackets, then maybe Sublime or Coda. Webstorm is good too.