Seems like a reasonable enough way to group people. I resonate with your NF club summary, though I suspect it may be more true for IEI and EII than for EIE and IEE. In general I think introverted intuitive types are more likely to spend their days dreaming about their own potential while chronically struggling to realize it. Honestly in my experience LII also have a tendency towards thinking about their own potential quite a bit and seem often to beat themselves up quite harshly over not accomplishing 'enough'. I'm less sure about ILI because I don't know many and the ones I've known better have all been quite old (my grandfather on my mother's side, and two of my college professors). I've met younger ones too. I just haven't been that close with any