I suppose in the car world your question might read "why don't people find taxis/busses interesting?". Not to say civie aircraft are as boring as busses but you get the idea. The more personality a vehicle has the more it gets noticed. The more you see something the less appealing it can become.
I have a little collection of Air Racers. I love those due to their liveries and major style they posses. Those are the only civilian stuff I have as far as aircraft.