The squat is considered by many to be the 'King' of lower body exercises, and with good reason. Done correctly the squat is arguably the most offective exercise you can do. Done incorrectly, it WILL cause serious damage, especially to knees and lower back. If you are a novice at training with weights, then find a reputable personal trainer to show you proper technique before you try to squat again. After all, you want to still be squatting at sixty (Not sure of your age, sorry) not hobbling along with a walking stick. But whatever you do, don't be scared of squatting, just make sure you do it with correct technique, and do what is comfortable for you, and leave the ego lifts for the muppets.