The only thing that would make me want a full-size one is the detachable joy-cons for local multiplayer.
I went for the Lite as I figured even that was pushing it in terms of size for a handheld. Not massively fussed with the lack of detachable joy-cons and the lack of rumble is also a non-issue for me. But yeah, think the main deciding factors are:
There may be more, but those are what I considered when making the decision. I guess the new OLED version throws another variable in the mix though.