Sure, politely agree to disagree here. 1 and 2 had some elements and characterizations which worked. And it is true most movies made from source material will have changes. Sometimes these work beautifully (most recent would be
Doctor Strange imo), sometimes not.
Last Stand was a cluster no matter which way you sliced it. James Marsden never got a proper chance to really be Scott Summers and he was great.
I'll clarify my position on Singer: Singer's major faux particularly since coming back to the franchise is spending way too much time with the same four characters: Xavier, Magneto, Raven and Logan.
First Class did a decent job of making Erik and Xavier interesting for the first time since 1, but the subsequent film was just a wash out for me. Of course my utter disinterest in Jennifer Lawrence did not help. I realize these characters go through a specific cycle and must grow/fail in order to become the characters they were in
X-Men, but why wipe out some great characters from
First Class (Azazel is my favorite evil mutant because he was so perfectly attuned to his era - the Communist Devil

).