Choosing dart flights is a very important factor in your dart set-up . Time should be taken in choosing the correct shape for your throwing style.
Standard flights are used by most new dart players, they are more efficient because they have a larger surface area. They tend to be more forgiving for darts thrown at an angle to the board because the larger surface area catches the air and straightens them up.
But this does not mean they would be the best choice you.
The slim or coalcracker flight as they are known we have found are best for lighter darts as they tend to cut through the air quicker. They were actually developed for soft tip darts which at most are 18gm
If your darts tend to hit the board at an angle and you wish to correct this then try using bigger flights
Some of the shapes I believe are just for looks like the heart shape seldom used by excellent players but used in many social groups for how cool they look.
You must also take into account the length of shaft size with the flight
I would recommend trying all shapes of flight at least once and also various lengths of stems so that you can determine what’s best for you. You may even decide on flights with a smaller surface area and long or medium stems.
Ideally, you want your darts to hit the board at a perfectly flat angle, or with the flight pointing slightly upwards, not more than 5-10 degrees to achieve this try three factors, dart shape, shaft length and different dart.
The cheapest way to experiment is with the dart flights