Alright, look, people. A waifu or husbando isn't a character you "like". It's neither your favorite character from a game, a series, or something like that. It's a character you love, a character you're emotionally bounded to. It's someone who brightens your day as soon as you see her (or him). Someone who makes your day automatically awesome and bright and makes it worth living. It's like a girlfriend, just in 2D. You may have various girls you like, but only one you truly love. Think about it.
A waifu is that special someone, it just happens that she's 2D. You commit to her. You love her with all of your being. You have her as a desktop wallpaper, as a figure, as anything, and you display your love to her in various ways. You spend christmas with her, you kiss her, you dream of her. I really hate that the term now stands for what we see in this thread, for characters you like instead of the ones you truly commit yourself to- the ones you adore.
Having various waifus is unforgivable too, even if you love all of them. It's cheating. Imagine how sad all of them must be. You're a freaking monster if you do so.
As for mine, it's Shurelia (<3). She will always be.
[21:15:19] <zatrox> what the fuck is wrong with you, vampko
[21:15:23] <CirnoThe9> EVERYTHING