My electric kettle is almost always on. One with stay warm function and temperature control is great to accommodate the different temps I may want for various teas or coffee. It's also useful for speeding up cooking when I need to get a pot of water boiling.

I can't necessarily recommend a specific one though, my old gooseneck spout kettle was great for pouring but the screws holding the handle in place rusted out and the plastic clips broke. My current one is insolated to help stay warm longer which is nice but the plastic lid has begun deteriorating. The only advice I could really offer is find something with as little plastic as possible in it's construction, especially where it may touch water or steam.