123d.circuits.io currently quite as intuitive as some of its alternatives, but it supports breadboard, schematic, and PCB views, it also has a novice level simulation (e.g., the breadboard LED 'lights up'), and circuits can easily be forked. I seen most of these features in other circuit simulators, but I haven't seen any other circuit simulators that have
all of these features.
I'm definitely not a fan of their maker level pricing ($12/month for 5 private circuits seems far too pricy for 5 circuits and too few circuits for $12/month). Hopefully they can develop partnerships with other hardware suppliers and moderate their fees!