In my experience I also hated the idea of integration, and still dislike the concept, but
it's really not as horrible as it sounds.
Your alters will still always be there, but the further you go into therapy, there will be a
'blending' that naturally occurs- you will start to pick up their traits and vice versa, memories
will be easier to access, and it will appear that you are 'integrating' but really,
everyone has parts... even people without DID.
What 'integration' means to me is the ability to access the memories of my parts and share similar
attributes of my kids.
I become more alive the more and more this blending occurs. They're still there, definitely,
but it's not as apparent to the outside world that there's a stark difference between us- the difference
is softening, we're picking up each other's traits and memories.
Blending itself it a slow gentle process. It's the processing that's the hard part, but definitely worth it.
It might sound scary especially if you completely disagree with some of the feelings and memories of your alters.
As an example, I for one completely didn't accept it. It wasn't until healing began on both sides that I began to accept
that their anger was a fractionated version of my own (they only saw and created it from the view of a child)
and the more we began to share life experiences the less scary the anger became and the more sense it all made.
Now I'm able to look at the anger and accept that it's there, and to help myself and my alter work through it.
And in that process, the anger softens, and we both realize it wasn't our fault it was there in the first place.
It's important to remember that your alters are NOT the pain, the anger, the sadness, the memories or the abuse-
they are essential parts of your being that learned different ways to cope with it.
So when blending occurs (integration seems to me an outdated concept) you're actually taking back parts of yourself
and accepting parts of yourself, not the abuse itself. You become stronger the more all work through it.
And yes, you will still have your differences, it'll just be softer, and easier to accept.