The trick is to get a lot of different kinds of plants. That way if 90% dies you know what 10% of plants fit your style of neglect. Buy more of those once you find out.
also a plant going limp like that is usually just it running out of water. give it some. don't drown it.
Works the other way around for me. When I finish a drawing I'll almost universally dislike it, but then when I look at it the next day I'll like it a lot more.