I 6ft tall, and weigh in at about 155, so a long LOP would be ideal, however I just prefer short LOPs. I cut about 1.5" out of my mossberg 590 stock and I run my ARs one click out from fully collapsed.
I do have a youth model slip on limbsaver on my 590 stock though (its really cushy). I had to get something because there wasnt any way that I could have sanded the orginal pad down to fit, and I couldnt find another buttpad small enough to mount on the stock locally.
I've been meaning to get a mounted buttpad to replace it, but it works well enough. And I dont chicken wing when I shoot my 590, I tuck my arm in like I do with my AR. So, even though I didnt like the cushy pad at first, I think its got me spoiled now.
Dont have to worry about the SG fitting my wife, she wont shoot it anyway. We use an AR for HD since it fits us both, and we shoot it the most anyway.