I don't know if it would help anyone "get it", but here's what I like about Big Blue:
1) I enjoy the fact that he's SO super-powered. I use comics to get away from my personal reality and if I were to imagine myself as a hero I wouldn't want to be some guy with gadgets, or some relatively low-level super power (where there's still a good chance they could be hurt if they're not on the top of their game) -- I'd want to be (relatively) worry free. (For the most part) Superman can lift anything, zip to anywhere in time, survive any assault. It's more of an escape for me. I don't really give much though to it's relation plot/fights. Even if Supes is only struggling versus a villain because of PIS, I just go with it (for the most part) -- the whole "he's used to holding back so much so he doesn't hurt/kill people, so sometimes he can't access all his might" excuse works nicely too.