Turned back on gaps - got something I think looks decent (thin gaps and smart_gaps on).

i3/config

@@ -412,8 +412,8 @@ set $indcolor #00ff00
 #############################
 
 # Set inner/outer gaps
-# gaps inner 10
-# gaps outer -10
+gaps inner 6
+gaps outer 0
 
 # Additionally, you can issue commands with the following syntax. This is useful to bind keys to changing the gap size.
 # gaps inner|outer current|all set|plus|minus <px>
@@ -421,11 +421,11 @@ set $indcolor #00ff00
 # gaps outer all plus 5
 
 # Smart gaps (gaps used if only more than one container on the workspace)
-# smart_gaps on
+smart_gaps on
 
 # Smart borders (draw borders around container only if it is not the only container on this workspace)
 # on|no_gaps (on=always activate and no_gaps=only activate if the gap size to the edge of the screen is 0)
-# smart_borders on
+smart_borders on
 
 # Press $mod+Shift+g to enter the gap mode. Choose o or i for modifying outer/inner gaps. Press one of + / - (in-/decrement for current workspace) or 0 (remove gaps for current workspace). If you also press Shift with these keys, the change will be global for all workspaces.
 set $mode_gaps Gaps: (o) outer, (i) inner