My DD's buy me them and infusers DH puts them out. I like Diptique and Neom. I have got away with a White company diffuser. We also have three from the Lakeland Candle company, St Bees, Whitehaven and Cleator Moor the latter smells of clean washing. They were on TV before Christmas and I wanted to support a remote nearly local Company.
I do know of two very bad fires caused by candles, a friend lit three on her bathroom window sill and forgot to put them out, her blind accidentally came further down during the night and caught fire.
The other was a fire brigade job, at a group of friends got together, the hostess made beautiful flower arrangements with lit candles. They went into the dining room and the draught from the door made the curtains flutter onto a candle. The smell eventually got to the dining room but the curtains and window frames were on fire.