It might be that a lamp is easier to replace if you make a poor choice and something larger might feel more permanent, but for me, it usually comes back to reviews. I'm actually ok choosing a sofa for my home and in a fairly rapid manner. There are thousands of people who share their comments if they a piece feels shaky or stain easy.
When it comes to rugs and chairs, the most feedback you usually receive is on color. It's usually something short like, "It's lighter than the color pictured online." Although picking up a chair at a flea market is easy, you sit in it, flop around and just decide. Online purchases, for me, are tricky. Chairs are almost as pricey as many sofas these days and they seem like more money for less seating and I often have reserve.
What piece of furniture stalls you out? Do you have chair phobia like me? Hesitate when it comes to rugs or floor coverings? Still unsure about sofas? What item would you rather buy in person if given the chance? Let us know below!