One thing that is also annoying is that some autocomplete list implmenetations will select an option on mouseover even if mouse didn't move. So if you place a

One thing that is also annoying is that some autocomplete list implmenetations will select an option on mouseover even if mouse didn't move. So if you place a cursor somewhere below the input, when you type, the list will open with non-first item selected, which breaks the muscle memory in a very annoying way (i know that after typing a few letter what the first item will be, so I confirm selection by habbit immediately).