The abundance of the colloquial "was"
Believe it or not, "I wish I were...", "If I were...", and "She would, if she were..." all use the correct form of the verb "to be". Subjunctive.
Although grammatical purists, like myself (but hey, I can be wrong, too), would never dream of using anything other than the subjunctive, a quick Google search will reveal differing opinions. Merriam-Webster supposedly makes an allusion to F. Scott Fitzgerald's use of "was" and "were" interchangeably as an indication of the correctness and "legality" of both forms. Really strong argument there, M-Dubs...
While I've been sticking to the strict rules of subjunctive "to be" verbs since I formally became aware of the usage in high school... Quick Aside: a classmate ridiculed another classmate relentlessly one afternoon for using an AIM screenname that started with "IWishIWas". I was NOT about to make that same mistake. Quick Aside Over. ...I have noticed a trend toward the more colloquial use of "was".
Lately, I've been hearing it in TV ads, TV shows (including Game of Thrones), and in casual conversations online and offline. In fact, I don't think I've heard a single person use the correct form of the subjunctive "to be" recently. Maybe I should give GoT a break though, I mean, they may live in a time or a world that didn't have or use it. Regardless, I think the days of grammatically correct hypothetical statements are limited. But maybe Merriam-Webster is correct, and all it takes to change our perception of correctness is someone famous bending the rules.