Best unit design feature in any strategy game

[Razznor]

Hi everyone!

First post here :). I'd love to know your thoughts on games that have customizable units. Preferably games that did unit customization incredibly well.

I played pretty much anything to do with Battletech and fondly remember Starfleet Command 2 and 3. I've dabble with HoI4 and Stellaris, but they only touch on unit designing.

 

Have I missed any great indie games that feature unit customization?

Am I the only one obsessed with this?

 

Thanks for your replies!