If you were about to Time Travel and you couldn't stop it. The magic portal has already opened and is sucking you in; But you could choose an era to end up in. Where would you go and why?
Not human prehistory. That one would suck, I'm in no way built and trained as a hunter-gatherer. Either some civilisation, pre-humans or a recent era, then.
From the wording I'm assuming limited control of where I land, So I can't airdrop in behind a world leader or into a vault, but I can choose a region.
Gilded age is tempting, for classic "change history" reasons, and because I could kickstart semiconductors early and make a buck. The disadvantage is I'd be destitute on arrival, and my education, while extensive, is undocumented there, so maybe I'd die in a coal mine anyway. Perhaps I'd pick England and try to chat up Bertrand Russel, he could vouch for my knowledge after a quick conversation and might even be a good choice to explain my situation to.
If I'm going ancient civilisation, probably Rome. I could find some sort of industry to start and even just my clothes will be valuable. The Incas would be cool to but if I'm being adventurous I want more time to prepare.
Pre-human, maybe New Zealand. I'll eat local forage and hunt moa until I eventually die. It's better than starving, and I don't have to worry so much about large predators.
IIRC they couldn't really lift an adult man very well. At that point, I can deal with them by carrying a pointy stick whenever I'm under open sky. Maybe some simple armour too.