Hello and thank you for the warm, welcoming message! I am also an FPS lover, along with survival games. I have not yet played any of the games you mentioned (Rust, Ark, Siege, DayZ and Arma), but I am planning on buying the last one on the next big sale! I will need someone to teach me tho, because I've heard it is not as "casual" as other games I used to play.
Thanks for the welcome, though I'm quite the opposite. I have over 300 hours on Rust and I regret every second of it. Hah, regardless I can see why survival is such a popular genre; It's just not for me. I might join Rust again if they do some really cool update that adds tanks or something. Thanks again, and I'm glad to meet you!
I want to like survival games but I just can't get into them for some reason. I played tons of minecraft (before it became cool), which is a big inspiration for that genre. And the building and development aspects - should be right up my alley. But I just haven't found one that grabs me. :/
Out of those you listed, I do have Rust. I might give it a go again sometime, see how it has developed.