Thanks for the reply Axur.
Nothing really special about them other than they are all running strong after years of use!
The X120e did struggle for most of its life as a windows machine but is now a happy and snappy Chromebook

And the second X220 was never meant to be a daily driver. I bought it as a parts machine for $44 but it turned out to be in better condition than my old trusty!
The X1 carbon is the baby of the group and is the only one that was bought as brand new (not used or refurbished). I got a pretty good deal on it during one of Lenovos sales.
I thought she would be my favorite of the group but as it turns out, I prefer a good keyboard over a nice screen and performance so I find myself bouncing back and forth between one of the X220’s and the x230!