Nir, are there any bird rescues near you? Maybe you could vounteer for a bit to get some more experience of the bigger birds. I have heard of many people who absolutely wanted a parrot but then were terrified of it once they were alone with it. If there isn't one near you maybe in the future you could take a holiday near one (arrange it in advance) and help out for 2 weeks.
Also if you really wish to expand your flock I would seriously consider a cockatiel. They can and do have the same problems as bigger species, they can learn to bite, scream, pull their own feathers out and all the other negative points of bird ownership. They also have a tendancy to be more nervous than other species.
They do have a lot of positives going for them too though, they tend to be more affectionate than budgies, you can train them like you can the other species, they tend to be quieter, be more laid back and much less likely to attack others but if they do then they won't do as much damage as a bigger species. Their laid back nature also makes them more tolerant to other birds (although there is still alot of danger so always supervise).
Of course none of this is a given, you will still need to spend alot of time training and socialising them.
Tbh I'm still not sure you are ready for a new bird, whatever species it may be but I can see now you are more willing to listen and not feel like you are being jumped on with people trying to put you off for no good reason. I hope you realise we are trying to help you rather than ruin your life.
What Michael and other have told you is not an exaggeration, it is a worst case scenario, it may not happen but unfortunately too many see it as a rare thing that the worst case will happen. Unfortunately the worst case scenario is much much more common than people imagine it to be. This is why we want to prepare you for the worst, for you, your family and for the parrot- just in case.
Ollie is my green cheek conure, he is a small bird and not capable of inflicting much damage but my boyfriend usually gets bitten several times a day, my bf is now scared of Ollie and Ollie knows it. The nightmare bird people are describing is Ollie from my boyfriends perspective but smaller. My boyfriend still lets him out his cage but will not handle him, use the phone or have a drink around him as he gets attacked. Ollie slightly favours my bf over me despite the attacks. To me Ollie tried to be a nightmare until he realised I wasn't intimidated by him, he was more testing the water and he still does from time to time. Today I recieved a bite which took a good chunk out of my finger, to be fair I deserved it as I was messing with his cage trying to coax him out but I cannot remember the last time he drew blood on me. Ollie is fine with the kids that visit at weekends but the risk was always there that they could be their worst nightmare too.