My friend and I were discussing watching all the X-Men film's before the release of DoFP this weekend, and we got into the conundrum of what order to watch them in. While many series have debated watching orders, X-Men's is pretty unique, considering the films are not only released out of chronological order, but the upcoming film is a direct sequel to both X3 and First Class (and, to a lesser extent, the Wolverine).
Fortunately, I don't think there's really a wrong way to do it. I think you could go in either of the two obvious orders - chronological or release - and not lose anything. It's like the MCU films in that way, while Star Wars, on the other hand, has much more reason for debate. But I still figured it would be interesting to get different opinions on which order people would suggest.
There aren't a TON of options, as the original trilogy obviously stays together, no matter how you do it (though I'd love to hear reasoning for an order that abandons that, like the Star Wars Machete Order). It's the more recent films that provide some interesting choices.
I think this is the order I landed on:
Wolverine Origins
First Class
X-Men
X2
X3
The Wolverine
While it's not directly based on chronology (the bulk of First Class happens after the bulk of Origins), the only real snafu is that Xavier's appearance at the end of Origins is clearly after the end of First Class. What it does instead, is it frames the series with Wolverine - I know, he's overexposed, but that's not our fault - and puts the Xavier/Magneto story all in one chunk. Also, Wolverine (and, presumably, DoFP) directly follows up from X3, so First Class after X3 would hurt the pacing.
As an added bonus, First Class after Origins keeps Wolverine's cameo more interesting, if there's any new viewers who haven't seen any of these films (they wouldn't catch the Rebecca Romijn cameo in FC, but that's just an easter egg, really). The only true downside is that you have to start with Wolverine Origins. Though really, you could just cut that out entirely, and then you wouldn't have to worry about the continuity problems it has, but I wanted to include it all.
OKAY - so that's my long-winded explanation and self-debate for something that is really inconsequential - but hey, that's what we do, right?
What order do YOU think they should be watched in?