LOL I didn't even understand the concept of scented candles in my 20s. I am pretty clean, so my apartments never smelled bad and i let cleaning products or air spray do their business. I've been "nesting" for the past few years, so the candle thing is recent. My wife is getting a kick out of me becoming Mr. Martha Stewart and moving in on her turf.
I have WoodWicks burning in almost every room 3-5 nights a week; and I always have them burning when I have guests. I buy them at Bed Bath and Beyond and always use those 20% discount coupons. They come in a few sizes, and many flavors. Rarely, I will spring for an overpriced candle at some boutique; more often I will buy cheap random candles from a local dollar store. I like WoodWick because they are contained in a jar and can be sealed with the included cover to douse the candle without polluting the room with the smoke that typically comes when you blow a candle out. When you want the candle off, just put the lid on the jar.
Never burn a candle in a room unless you are occupying that room and the candle is within your line of sight. Never burn a candle near any object that could ignite such as curtain, newspapers, a box of tissues, etc. Be very mindful of potential hazards that could be caused by a dog or cat moving around your candle or moving objects near your candle when you are not looking. Do you have one or more fire extinguishers in your home? You should. Small cheap one cans be purchased at Home Depot.