When i've got a heavy load across my shoulders, it makes me feel warm inside to have a big strong man behind me ready to grab me. (no homo)
But in all seriousness i've always done the majority of my squatting without a spotter, up to 185kg. That was in a squat rack with no safety bars. The fear that if you fail you're fucked keeps
The gym got a new one with nice solid safety bars, but sadly i've become a pussy and it's a long time since i got anywhere near squatting 4 plates.