2015 Leaf arrived a few hours ago.
I plugged it into the socket for trickle charge, my wife is concerned that the charger is very hot (but I can hold it in my hand), also the Leaf owners manual says not to use it on a regular basis. I was hoping to just plug it in when not in use including overnight.
Any knowledge is appreciated.
The EVSE (trickle charger - 120 volt) that comes with the Leaf is slower and less efficient than a dedicated unit. It can be used, and many use it, as the only EVSE for the car, even though Nissan recommends against doing so. You need to make sure the outlet it plugs in to is in great shape (tight connection), with no other heavy loads on the circuit.
If at all possible to install, you (your wife) will be much happier with a dedicated (240 volt) EVSE. It is faster charging, more efficient, and no heat issues with the unit.
You will also see a lot of complaints here, if you use the wrong terms. The unit that supplies electricity to the car is an EVSE. The charger is built into the car.
I used the EVSE that came with the car until I got a dedicated unit installed. It now stays in the bag in the back of the car, for emergency use.