DD has just said she'd like a nice houseplant for her upcoming 18th birthday present, not something I would ever have guessed she'd want! Reality says that although she'll have good intentions, 'thrives on neglect' may be an important criterion. Nothing which needs misting, is pest prone and which can survive with erratic watering, I think. My thoughts so far are peace lily (robust but a bit meh) or an orchid, but just thought I'd see if there were any other ideas?