6 inches is huge. I thought my 3 1/2 inch platform heels were big. I hardly wear them even though they're what's popular with the alternative style I'm into and they match so many of my outfits. x_x I did climb a tree in them once, though.
Anyways, back on topic, if you like them wear them! Maybe some people will think you're freakishly tall, but models are just as tall. Obviously we like tall girls if we use them for models, right?