I recently bought a glass kettle which is brilliant -someone told me not to use plastic ones and as I take notice of things like this, I went out and bought this fancy glass one.
I do occasionally also boil on the gas hotplates, if I am cooking pasta/rice, however still find it much quicker to put in the electric kettle -even though gas is supposed to be quick, I think in the case of water, electric seems to work better for me.
For tea and coffee: my glass electric kettle. Pasta or steaming veges: saucepan on the stove. Occasionally, one cup in the microwave, mainly if there is a behemoth in the kitchen standing in the way of the kettle and I want my cup of tea NOW.