I've had 3 mil figures in my life (3 serious relationships).
My first boyfriend who I was with for nearly 6 years whose mother was an arsehole. Very over the top nice to me (and my own DM to be honest, I think she was trying to strike up a friendship with her) but nasty behind my back. I broke up with her son when he hit me in her house. She heard all the commotion and asked what was going on. I said her DS had hit me and her reply was...what did you do 😳
My ex-h's mother is all in all a nice person but my god everything has to be about her all the time even when it came to my wedding (which was nothing like I wanted it to be, it was pretty much a wedding designed for her and my ex, fucking weird).
My MIL is a nice lady but I'm constantly being put in the middle of everything all the time, rather then message DH she messages me to tell him things or to talk about him (I refuse to keep things from him though).
We spent Christmas Day with his parents (as well as SIL and 3 DC, my own DM, sister, BIL and my 2 DS's) and it was a disaster. It was like DH's family didn't want to be there, his DF made constant digs towards him etc. The next day MIL messaged me asking if DH's mood had improved, I told her straight that actually he was quite upset with his DF's attitude and felt like they hadn't wanted to be there etc. Long story short MIL suggested to me that I needed to get DH to the dr because she thought he was depressed. The following two days Facebook is full of status updates from MIL, FIL and SIL about going for drinks and a curry, next day same thing but pics of family games night. Neither of which we were invited to.
So basically I won't be anything like any of those three and I'm sure it'll be an improvement. Sorry for the long post I didn't realise how much I got carried away.