Tough one man, he's gotta have an over pair (or pair of tens), the only question is if it can beat your kings. I know your style, and it's probably a borderline call. All depends on your reads. He probably knows you're on an overpair as well, and knows you can't beat aces, so he goes for it. You just gotta think of that age old question, "What would he jump all-in with that I can actually beat?" QQ? JJ? A10? Honestly, I probably would've called too, but I've been a major fish lately, sliding just like you...