Actually I have Opera, FireFox, Chrome, and even IE on my mini, laptop, and desktop computers.  I like Opera but had difficulties with a couple websites I frequent.  One business site only works well with IE.  I mentioned it to the marketing manager, turns out his son is the company web developer...!

Something I have done to make browsing easier for the technically uncomfortable is set up different home pages for Opera, FireFox, and IE.  So if you want to see these pages go to the desktop and click IE and they open.  Opera opens different one as does FireFox