1. If you could do it again, would you still buy, why or why not?
Yes. I bought and capitalized on 0% financing and rebate for using NMAC, tax rebate, and "below invoice sale". Even with those benefits I have seen gems where someone bought a new Leaf and turned it back in, backing out on the sale. Used is definitely better. As any used car you will need to weigh the age, mileage, and cost.
2. Overall Best about the vehicle.
One of the things that I had not expected was the joy of not buying gas. It is one of those things in life that you just get used to doing, and it is really kind of liberating to not have to stop your trip and seeing money going into the tank. My "energy" costs per mile is almost free (1 cent a mile). At 2 years old and 27K miles the 2014 Leaf has cost $0 maintenance, $250/month in fuel savings (includes not driving vehicle #2), a $50-75 decrease in electric bill by capitalizing on residential EV rates. These savings almost cover my payment. The car itself is really a great automobile.
Question....You ever notice the oily smell on an ICE car at start up now?
3. Biggest complaint about the vehicle?
If I had to pick a single annoyance it would be the NAV is not really friendly to use. That may have changed since 2014.
4. If you don't drive much normally 20 - 30 miles daily.. could you survive with just L1 charger?
Yes you can survive. I drive 25miles total commute. A L2 really allows you do additional, and opens up the range. It allows us to use the Leaf instead of car #2 (another benefit of saving gas).