Developing your own style became something very interesting, very important to me.

I'm fortunate in one respect; that I don't have a lot of work in my studio. Most of it's out, gone; either sold or in galleries. I work with a lot of galleries.

I am good in the fact that most of my reviews have been very positive really. I get pretty good reviews. There have been some that aren't - critical. I think they are extremely - the people that wrote them really don't understand what they are looking at quite frankly or have a very preconceived notion of what conceptual art should be or where I am at or the fact that I may change what I have done from what I did 20 years ago. But there is always some reason that they just sort of get it wrong. And so it certainly doesn't affect my work.

If you want to know about what's good in art, you should talk to an artist.

I do make some drawings for wall pieces. I do work out some ideas for large-scale wall pieces where I have to organize words or get proportions right. I do keep them in my files. Not an exhibit or a show; just as part of my records, my archives.

There's a kind of poetic aspect to inert gas. And remember, first of all, they were completely unknown a hundred years earlier. We just didn't know about them. And then when they were discovered in the atmosphere, the idea that this is a material that would breathe in and exhale and becomes part of us for a while made it even more intriguing. The names, the Greek names, are interesting, too - if you translate neon, xenon and so forth are kind of interesting.

I know where the mistakes are. Nothing is perfect and I understand that.