Couple of ideas. None are particularly original, but also can't recall seeing any of them yet done in VR (at least in the past 3-4 years). And I'm sure I've probably asked for some of these before too, but been a while.
1.) You wake up and your ex-girlfriend has you tied to the bed, proceeds to taunt you for breaking up and uses your body as she sees fit. Obviously requires a good improviser and plenty of humiliation talk, and would basically have to be shot all in a laying position to fit the theme. Bit "rapey"? Sure, but it's porn and a fantasy.
2.) A VR version of something like MomsTeachSex (know @LordCrash has also asked for this), and which I'm desperately hoping the upcoming Lily Lou & Jessica Ryan scene will be similar to: daughter has no idea what she's doing with her boyfriend (you), mom steps in to guide her through everything. Walking her through step-by-step, daughter following those directions, etc. VirtualTaboo has plenty of these, but the broken english + dropped plot after 3 mins leaves a lot to be desired.
3.) 2 girls competing over you, ala the Wankz classic "Dear Diary: Jackpot". Who gives better head, who rides you better, who can make you cum faster, etc. etc. etc.
4.) I think it was @GaryLopez641 who previously asked for something like this, but your biology tutor walking you through male/female anatomy and ultimately sex. Something weirdly hot imho about a woman just describing very clinically what she's doing to herself and to you as she's doing it. TBH it could also take place at a hospital/sperm bank type setting with a doctor.
5.) Could be somewhat similar to #4, but a visit to a brothel- specifically starring someone (and super specifically Lacy Lennon) who has worked in a brothel before. Setting the scene with discussion of pricing, do's and don't, basically just aiming for a bit of the "clinical" talk as in the scenario above, just in a different setting. Know my European brothers can get this experience pretty much any time, but we Americans don't quite have such an easy option and it's a fun fantasy.
Plus, I just want to be able to imagine I was one of the lucky bastards who visited Lacy before she got out of the business and into porn...