Recs.
Updated
Enlightenment, also known simply as E, is a compositing and stacking window manager for the X Window System. Since version 20, Enlightenment is also a Wayland compositor. Enlightenment developers have referred to it as "the original eye-candy window manager".
SpecsUpdate
Pros
Pro Lots of themes available
There is a large selection of themes available for the Enlightenment window manager, meaning that customization to one's preference is very straight-forward.
Pro Havn't found a WM that beats e16 in 20 years.
I've been using e16 for about 20 years and tried quite some other WMs, but always returned back to e16. It's fast, doesn't use much resources, is highly customizable and is rock solid (I cannot remember it crashing). It's combination of simplicity and beauty is unmatched.
The default theme on e16 is kinda disappointing. Try B-42 or Dark-One.
Be careful if you enable Composite. It works flawless, but you can screw your menus when playing around with the transparent settings in the settings menu. Making a backup-copy of your .e16 preferences beforehand might save you some trouble.
Cons
Con Minimal set of utilities
Enlightenment only comes with the bare essentials, meaning there is little that can be done upon first install in comparison to other more fully featured desktops. This does, however, leave all the customization of what apps to install up to the user, which may be a plus to some and is directly comparable to most other bare bones Window managers.
Con Sub-menu does not change direction when out of space
When you right-click for the menu in the right part of the screen but there is insufficient space for the cascading menu, you have to interrupt your selecting and move your pointer to touch the right edge of your screen - this manually moves the menu over to the left a little bit, so it has space. If there is a sub-menu, you have to once again move your pointer to the extreme right edge of the screen, for it to move over - and so on, for each level of sub-menu.
Every other OS and app/program in the world today, simply changes direction to where the sub-menus cascade. Whether that be upwards because it's too close to the bottom (we see this in the selection menus in our browsers in forms, or to change sides as we are accustomed to in all programs). This is logical, universal, expected behavior. But not in e17.