Due to certain circumstances I am not going to explain, where I lived it was impossible to get the games unless you pirated them.
That said, I right now own in one form or another, all 3D zelda games, LttP, NES Zelda, Adventure of Link, LBW, Minish Cap and Triforce Heroes.
I don't care much for different versions of the same game unless they have big differences, though I will buy most new remakes, but I won't go back and buy older versions.
Recently I started a personal campaign to own every single entry in The Legend of Zelda franchise, in one form or another, then beat them all at least twice in every game mode (except when the difference is only dmg and the like) and then finally beat them all once again in chronological order. If I get a capture card and a capture 3DS, I will stream it.
That said, I agree, for the purpose of this discussion I wouldn't count anything that doesn't have "The Legend of Zelda" in the title (that ofc, also excludes CD-I, as those are just "zelda")