Firefox has nice features and all, but it crashes all the time. According to
this page, I'm not the only one of this opinion.
Opera seems to be incompatible with many websites I visit on a regular basis. I'm very pleased with Opera Mini, though.
Don't know about Netscape; haven't had it installed for the past 10 years. Maybe it's like Firefox, only without the crashing?
So unfortunately, I'm currently using IE - a browser I don't even like very much.