this is kind of my job! and IUD's are great long-term, but not permanent options. like anything (depo, Implanon, etc.) there's going to be a few months of an adjustment period. you might cramp for the first couple of months and bleed a bit irregularly, but try to tough it out b/c in most cases IT WILL GET BETTER.
if most women can get past that first three months of depo, they'd enjoy eventual light-to-no periods, etc., but that 1st injection time period can be too much for some women. same w/implanon. it's like depo, but can last three years but can have some pitfalls in the beginning, too.
i liked nuvaring, but after childbirth and a stinkin' episiotimy it doesn't fit right anymore. SO, i'd probably do Paragard (the other IUD that doesn't have hormones) ...
you can email me or PM if you have any other questions. :-)
ETA: i know gals who had paragard and LOVE it, had intial crampiness and bleeding that resolved. i know gals who had mirena and had it removed for bleeding/cramp issues ... so, yeah, we're all different. as for nuvaring, yes, my husband said he could feel it, but that he didn't mind and it didn't hurt -- so yeah, maybe some men might be creeped by it.