I don't like to waste my money on trendy stuff even if they look beautiful and popular. That BVLGARI Serpenti ring in the first pic is a classic and a timeless beauty tho.
I would pass on anything too elaborate (like the leaf) or cliched (like the skull) but I love the simple bands, zig-zags, and Xs. The only ones I'd probably purchase for real would be the simple eternity bands.
Personally, I wouldn't wear so many rings together. But, I would consider some of the rings individually - and have already been thinking about getting two pave zig zag rings from EF Collection (either rose gold & white gold or black diamond & white gold).