What I am really trying to think about is whether and in what ways the OP supplies the 'missing pieces' for our WAS MLC. They go for a range of types, and some of the r's last and some don't, but I wondered what the MLCer was looking for in choosing that particular person, or whether anybody would have done .. .
No, IMO, just anybody wouldn't have done. IMO, the WAS goes looking for someone who demands nothing of him/her. In particular, the WAS picks someone who will not demand that the WAS look at him/herself, or question his/her choices, in any way. I think the WAS is running from many things, but at the top of the list I think the WAS runs from himself as the source of his problems.
I think that is why the often pick people just like them who seem either very needy, or just plain beneath them. No demands, no expectations, and certainly no expectations to change themselves.