I will be getting two tattoos in the coming year, most likely - one on my upper back between my shoulderblades (yes, I have shoulderblades, now!!) and one where the "tramp stamp" goes. The upper back one is in design stages right now - I need to perfect it before next month. The lower back one will be once I either hit goal or once my body decides it's done losing. I imagine neither of these places will experience shift.
However, I would also like to see something on my hip - but I carry a LOT of weight there and I'm not willing to play with that area until I'm done losing. Same with my chest. Essentially, despite others' testimonies, I would recommend that you look at the areas that you PERSONALLY retain fat and avoid those places for tattoos. I could get a tricep tat today that won't barely change by the time I get home. A person I know could do the same and because she carries so much weight in her arms, she can almost certainly count on batwings dragging that tat far out of place.
Less concerned about fitting into the world - your world, that is, 'cause it doesn't really matter any more. None of it really matters any more. Yes, I am alone, but then again I always was as far back as I can tell. I think maybe it's because you were never really real to begin with. I just made you up to hurt myself... and it worked. Yes, it did! - Only, NIN