Default Do you use MIUI and why?

How many of you use MIUI and why do you use it? Do you use it for the theming options or for the UI itself.
Sanyo SCP-2700 (Trash) -> LG Lotus (Stolen) -> Treo 700wx (Brick) -> Treo 800w -> HTC Vogue -> Samsung Fascinate -> Samsung Epic -> HTC touch Pro 2 -> Samsung Epic -> Samsung Galaxy Note 2 (Shattered Screen) -> Samsung Moment