Yes, as I find it hard to always be a very diligent worker, onions fill up space nicely and look great during their growing period. I grow garlic, brown and red onions and shallots, varieties that I like, and which are not always so cheap - I saw shallots at 2.80 euros for 250g the other day!!! I now manage to grow almost all my own usage in a year.
I think I just like them! I don't grow veg according to its value to buy. But because it's better and tastier when you grow it yourself.