Opera has been my main browser for many years now - and apart from the occasional issue with some sites that don't support it, I use it for everything. Heck, when evaluating webapps, if they don't have Opera support I look for another one, period.

Things I really like
- tabs and sessions that just worked the way I would expect
- the easily added search options. I can highlight a word and search it in board game geek, my public library's catalog, DC etc. etc.
- reopening closed tabs
- search in history from the url bar
- the synchronised notes. I absolutely love the notes. I have tons of things in it, saved snippets from websites, reference information, often pasted bits of text (for "paste from note"), things I can never remember (such as affiliate ID or my computer specs or the list of games I already own in some form)
- keyboard control
- you can install, uninstall, enable or disable extensions without having to restart the browser. To me, that is extensions done properly ;)

It takes so much work to get firefox to work half as well as Opera does out of the box. Yes, there are far many more add ons available for firefox but what's the point nowadays when we have webapps and all?

Last year I had to work with 2 customers who have a google apps setup and in order to not constantly have the collision of the google IDs I started using firefox and chrome to have each browser focused on one client/project etc. Both are usable but in each I miss a lot of little touches and it takes a lot of add ons to get them back even in a partial manner!

Yes there are more extensions in Firefox but with version 10/11 Opera finally enabled a more integrated extension type and you can find some of the same extensions now. And

Extensions I use on Opera:
- ghostery
- lastpass
- pastebin
- cleanpages ("readability)
- persistenttext (saves form content automatically)
- Textarea resizer
- a couple web developer ones

extensions I wish for opera:
- diigo

That's actually it...

Most of my domains moved from godaddy years ago except for a few ones. I must say though that their admin tools are pretty good.

I ran an agency for years we interfaced directly with nominet and opensrs and even back then domains' cost price to us was cheap. So charging $19.99 like some do (or $35 like nominet does) is a tad silly unless there is a lot of added value (dyndns might have added value)

I currently have many domains in the UK with daily (http://www.daily.co.uk) which has reasonable prices, reasonably good interface, and actually has support people that come across as people.
I also have a bunch on gandi and I have had no problems with them. Haven't used their hosting or any other services, but domain name registration comes with included minimal blog hosting, kind of cute :). And they are clued up.

If you are moving domains that have active services, be very careful that everything is set up right to avoid loss of access

- godaddy does allow you to have dns set up for domains that arent registered with them, which should allow you to keep the DNS set up there for a while after the transfer. (I am not sure if it needs a hosting account for this to work, but it is probably worth buying 1 month at 4.99 to prevent issues). That way you keep your NS records pointing to godaddy until everything has transfered and you have configured your new DNS

- some transfers are capable of copying the DNS setup automatically but this depends on a lot of factors (your existing DNS allowing the info to be accessed for zone transfers, for one)

- use a third party DNS service to be independent of registrar. For example I use fastmail for email and they can act as DNS for domains. I also use xname.org (with donation!).