I've been doing costuming now for a little over a year. Mind you, my first costume is a custom Mandalorian. I've "trooped" as that character several times and everyone's always responded with a WOW or something like that. And, yes, compared to the TK set, what I've made isn't that expensive, but the kudos I've heard already make me really excited about my next costume.
Personally, I don't really care what people think about me. Whether I'm in costume or not, it really doesn't matter. An interesting story on that...I was having a discussion with a former coworker of mine about our hobbies. He's all into cars...buying, selling, modifying...he was even the vice president of the local car club. When he was saying not-so-positive things about my costuming, I simply reminded him that while he spends tons of money on a car he'll have for a few months, I spend tons of money on a costume I'll have for a few years or more. And, you can't take a car into a cancer ward, can you?
Plus, I've had some success with making helmets, and it's something I'm still doing now. The first thing out of some people's mouths when I tell them I make helmets is "Star Wars geek stuff, right?" But when I tell them how much helmets sell for, they change their tune quickly.
In the end, my philosophy is that this is all about fun - both for us and for the people we entertain. I love it and don't expect to quit for quite some time.
David.