I LOVE Arabians, and after riding and being around other breeds, I always go back to them. I could go on for days, but I'll start here.
Arabians are very sensitive, just the way they look at a bush is completely different than a quarter horse. If I were you, I would go ride some Arabians, and see what you think about the breed. They take some getting used to compared to other breeds, that's for sure. Arabians are unnerving to people who haven't really interacted with them. All their movements are very quick, they carry their tails up when observing things, they snort and blow and are wide eyed and full of energy (normally, anyways, not all are necessarily like this). It just takes time to understand them and get used to not overreacting to these movements. Some people are just not comfortable with horses that are this sensitive. At the same time, they are easy to ruin with bad training, which is what I think gives Arabs a bad rap. You can't really muscle them or hit them to get after them the same way you can with other cold blooded breeds. Arabians also have a tendency to "blow up" a little easier, but again once you are used to riding and handling them, and once they have bonded with you, you will know when they become nervous and be able to to prevent it from happening. The biggest plus to Arabs is their intelligence. They are so easy to train and work with, and they learn new things super quick. They also bond to people like no other breed I've experienced. Every Arabian I have owned would never leave me if I were to fall off, even if something scared them. They will be the first to come to you, and ignore all other horses. I guess you can sort of compare them to dogs in that respect, they really crave attention from their "human". They are also amazing to ride, they are like billy goats that can gallop up mountains and cross any kind of terrain. Their gate is not as smooth as other breeds, simply because they have short backs and move quickly. But, they never run out of energy, so if you like long trail rides they are perfect!