Not necessarily your favourite. Just the one with good all round results.
I am thinking mine is a yellow perennial Wallflower. It has been flowering for several weeks now, it's a a lovely bright colour, and it's got the typical wallflower perfume. Comes back year after year and needs very little done to it. Excellent in fact. 
From sinner to saint, quite a transformation.
Govt announces Ukrainian style scheme to bring thousands more migrants to UK
Why do people lie online are they living a fantasy or winding us up?



and looking at possibly the most useful plant in my garden.
I meant 'useful' as in keeping the garden looking halfway decent for the most length of time.


