So, first, let's put a strong emphasis on 'fantasy' as in, 'fictional concept I enjoy' and not 'thing I plan to do to someone'.

But yeah, if you want darkest darkest, that's A) not something I've settled on, and B) likely would not be public information, but! Lately I've been on a slow-burn corruption kink sorta kick - wanting to take the role of a trusted confidant who gives advice and instructions that gradually warp someone into doing things that they never would on their own. Poison-tongued advisors to the throne, abusive therapists, corrupted artifacts, so on. I'd be blameless, of course - people would be suspicious of my influence, but my victim only ever speaks of me with the highest regard, and they're so forceful now that it's hard to challenge them. All with a healthy dose of hypnotic suggestion and conditioning!

With some caveats, definitely! The full-body coverage vibe is not it for me, and the gas mask aesthetic is like, fine, but I love identity suppression and the full-service aspects of it. Techy mind control is also something I adore, especially if it's involved or interesting. Any corporate shit is right out, tho

To me it's ultimately about having a collective of servants, reduced to their unique capabilities and features via intense brainwashing that's then gently maintained via techy helmets to keep them all inked up. Any part of their identity that doesn't serve their new purpose is molded into what fits the collective - a shared experience that is rapidly reflected onto each new arrival. That core's the point, so as long as it hits on that I'm usually good.

Also, the four digit ID thing is a bad idea, you're gonna run out of those basically immediately

I think the first, best advice I would have is that you should talk to your play partners about this! It's real easy for people to get caught up in the play of power dynamics, especially if they aren't used to dealing with kink outside of that framework. If what you want is a chance to dom interrupted, then you may need to ask for their cooperation. It doesn't fit the fantasy so much, but in my opinion that always comes second.

Other than that, if the problem is specifically your concern (which is not a bad problem to have, imo!), one thing that I've found helps is being able to trust your partners to communicate when you should be concerned. If you establish clear safewords, and other consent frameworks, then your partners will have ways of telling you that they're having problems during play. As long as you can trust them to use those frameworks, you can be as domineering and controlling as you like. Taking some time to reaffirm any procedures you've set up with people before getting into play might help ease your worries.