Sometimes I play with all 3 in a day. Why? both because I'm nuts, I like to tinker and I try and fluctuate with the overall skill level. Also, some days I start off with the electro and shoot with slower setups as I start to run out of paint.
I like my electros (mostly now as I converted one to single trigger) primarily for the eyes. The excess speed is nice in a pinch, but the comfort of knowing I won't chop a ball while running and bouncing like a fool is just a nice feature. Bust out the mech and pumps later for an excuse to be lazy, I've noticed that once I switch gear from the "fast gun" expectations put upon me are drastically reduced.