- Obvious things like encryption support, tabs, full cookie options, (customizable) "smart" address bar, speed dial, history, favourites, optional synchronization, extension support, spell check...
- heavily customizable UI,
- plenty of other customization through settings or Opera's neatly done opera:config,
- easily togglable (is that a word?) side panel with M2-style lightweight E-mail client, notes, history, page info, and whatnot,
- detailed page loading (speed, domains, amount of transferred data) and file download information (what, where from/to, when, how much),
- in-built "plugin-on-demand" and noscript,
- Dragonfly (I just can't seem to get used to Chromium's developer tools),
- easy image properties ( http://puu.sh/jEqjh/ab197d996e.png ),
- mouse gestures and switching between tabs with right-click + mouse wheel up/down or something similarly effortless
- tab stacking,
- and last but not least: if you want to make money off me, instead of sneakily tracing where I go and what I do and partnering with Google, ask me for it on first start and maybe with a discreet "donate/subscribe" button on the start page / speed dial.
...
Things that would be just nice:
- tab sandboxing
- their own rendering engine
- Unite
- One process per browser, not tab
- "reading mode" as seen on WP IE
...
I guess I want more of a browsing bundle, heh.