Not DID, so this may not relate. But since it may? Here's my piece.
Oddly, the TV series Dollhouse & book The Host have probably helped me the most. I despise this body when I start to forget the lessons I pulled from there. It's betrayed me, I betray it, and we both sort of sulk. Treating it as an entity other than myself... I'm just a visitor, a passenger, my body is not me... On the other hand changes matters. It's something I'm borrowing for a time. Then I can revel in it. Point A to Point B, and everything i can make myself do, feel, be; see, hear, touch, taste, smell... Hedonism. I can train it, sculpt it, shape it. I don't despise it the way I despise myself. (I also like myself, no problem feeling completely different ways at the same time, but it's the flat out self hatred that leaks over into hating everything about my body, as well). I don't need to hate my body, because it's not who I am. <chuckling> I still do hate my body a lot of the time, but I don't need to.
There was a time when I was my body. I asked it to do something and it responded without hesitation. We were one thing. Now, that's no longer good or useful, much less true. It's just a house for my spirit. But I also have custodianship of it. And I haven't been taking very good care of her. I'm trying to rectify that. I'm trying to also have patience. It took a good many years to damage it as much as I have. It will no longer respond as if I've been taking care if it for those years. It will take months and years to change. I'm thinking of it like restoring a house. There's wiring and plumbing, there's structural changes, there's cosmetic work, there's purpose & use, there are additions to build, there's furnishings & decorations. These alterations take time. But, as long as I have custodianship of it, I have the right to make the changes I want. Ownership, rather than renting, although I say visiting and borrowing. It may not be me, but it's mine. So what do I want it to be? And how can I get there?