I'd go for Chrome, been using it since release almost, even use it on a VERY old laptop I have as it won't run anything else smoothly.
If you have a Google account, you can use Google Drive for just about everything, even offline and PDF creation, Open Office is also a good option for 'backup'
I have Google Drive Sync and Dropbox Sync, but honestly rarely use them... If I want to put something into those folders, I just use my bookmark and drop it in.
I personally do quite a bit of content creation when I'm running around with my laptop and not much gaming, so things like Audacity or whatever you use to create, isn't a bad idea.
The only protection I use is Microsoft Security Essentials, I've never been a fan of the other crap and I'm not an idiot with my browsing and Chrome keeps you safe as well.
I honestly don't think I have any games on my lappy, I often have it sitting next to me playing some TV show or video (been using Winamp since it came out), or I use it on the side while I have games open.
I used to use it for Teamspeak, but found it annoying having to press a distant key, or a button on another mouse to talk. I do use it for Skype, IRC and other chat's. Really anything that I would need to alt-tab to open or use if I'm in-game on my desktop.