What is bothering you about Opera?
The first thing I did after installing it was to find the preferences editor (invoked by typing opera:config in the address bar) and change many settings in the User Prefs section of it. I also learned a few things about it in the process. Some settings are frustrating because the Help file is not up to date, so the newer settings are not explained.
I found that you can add new function buttons to the Main Bar. An Opera forum contributor has a page with many buttons that can be downloaded and used. It is at: http://220.127.116.11/
You can block many ads with Opera if you get a good urlfilter.ini file and add it to your profile directory, from a link on the page here: http://blogote.com/2009/ideas/browswer- ... ement.html
You can get themes for Opera, from here: http://my.opera.com/community/customize/skins/
UserAgent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; rv:18.104.22.168) Gecko Firefox/3.6.6