I hate tabs, and I like windows.

Why?

Switching between windows is Alt+Tab. Simple.

Switching between tabs is irritating because it is a contrasting situation:

1. The keyboard shortcut is not a standard, every application does it in its own way. It could be Ctrl+PgUp/PgDn or it could be Ctrl+Tab.
2. Ctrl+PgUp/PgDn requires both hands since Ctrl and PgUp/PgDn are on the opposite ends of the keyboard.
3. Ctrl+Tab is awkward to use (depending on your keyboard).
4. Many applications don’t loop back to the first/last tab (I’m looking at you, gnome-terminal) which means I have to learn a new paradigm such as Ctrl+1, Ctrl+2 which totally breaks the flow.

Amazing how a keyboard shortcut can ruin the usefulness of the feature.