Flying a Model Helicopter is rewarding, but rewards only comes with dedication and patience. If you want to go out and buy a helicopter, fix it in one day, and then zip around the sky like an expert the next day, then helicopter flying isn't for you.
Cost is another great factor to consider.
This hobby is by no means cheap. Crashes will happen, and when it does, you'll be spending several dollars to several hundreds on repairs and spares. You have to be mentally prepared to put that amount of money aside for the rainy days. Lastly, flying a model helicopter is safe only if you are safe. The rotating main blades of the helicopter spins at 1500 rpm, with a blade radius of about 1 meter.