Without even getting caught up too much with the socionics details, that's a very useful dichotomy to see in interactions between people. I know I heavily identity with seeing a problem then manifesting fanatical optimism towards solving it... in fact I'm constantly doing this, sometimes it's "potential problems".... I'll see it and feel compelled to point these out.... I find to some people this is the grand offenses of all offenses.... they get mad at me and I'm left without any sense of movement towards a resolution, and usually I drudge along for a while feeling low becoming obsessed with the problem until I feel some hope. It's horrible really, gahh..... but I'd think if people started to just realize these differences between each other it could be better.