Well, if it's "my" gimmick, I should at least own it.
I guess most everyone knows that I like the toony trope of characters having detachable body parts. For me, most of the appeal is difficult to articulate beyond simply thinking it's fun. The times FiM did it (which are a few, like what happened to Pinkie Pie in Magic Duel) always got a laugh out of me, and unlike a lot of other silly cartoon stuff, it's so nonsensical that I never felt like it'd be painful or anything. I also think it'd be nice since, in times when I'm feeling severely lazy, I imagine it'd be comfortable to take off your head and limbs like taking off shoes and heavy clothing. (Maybe a little of it is the part of me that looks at cyberpunk media and wishes for the day when upgrading and modifying your body is commonplace, but filtered through my cutesy cartoon aesthetic.)
At this point, it really does feel like it's part of my look, though. Like with my forums avatar, I'd originally drawn it on a whim just before the horsepocalypse and then uploaded it because I needed an avatar when the new forums came online, but I've had that for so long that it feels like it's more than that now. As an example, I saw this post on Tumblr recently, which inspired me to draw my ponysona in his normal pony form but otherwise like in my avatar:
As I was drawing this, it felt less like I was drawing something different and more like I was drawing him just as he should be (for lack of a better term). Identity can be weird, huh?
Anyway, if you ever wondered about my interest in this regard, you can ask about it here if you want.