My (UK) MBP has the Alt symbol.

Control doesn't have the caret, but it isn't used nearly as much as Cmd/Alt/Shift for shortcuts (mostly reserved for further modified versions of other shortcuts, and Unixy stuff). As it happens, I do have a caret of sorts on my Control key as it's remapped on to Caps Lock ;)

I had no trouble learning and coming to like how keyboard shortcuts are done on the Mac, and that's because I didn't consider my previous environment the authoritative way to use a computer just because I used it first. (See also users obsessed with maximising every window because that was the done thing on a 15" CRT)

The US keyboard is weird. The German keyboard also has the bathtub and a symbol on the shift key (also on tab), also symbols on the enter and return keys. No caret for shift, though.