No, you are not stuck with the Metro interface - you can delete all the tiles, and leave yourself with what is, essentially, a not quite as spartan Windows classic start menu, with a few more stuck options.
The last 4 updates have all featured a slightly different variation - I think I prefer the latest one - it's completely resizable, and hopefully, I'll be able to turn it, and the task bar, back to the standard classic battleship grey. So, if anything,
IMO it's actually closer to WinXP, without having to use any mods - the exceptions being color and the start button, which is the Windows Logo.
If anything, the majority of the complaints from the Win8.1 "upgrade" are no longer applicable here. The one bit of strangeness is the power selection (off/sleep/restart/etc) is above the All Program (all apps) selector, where in the past, it was the opposite. Some may disagree, but aesthetically, I find it as clean, and as usable, as Win7 set to classic mode and set for performance.