Great informative thread

My adventure with Linode started around three years ago when I need some proper hosting for running JIRA (a bug tracking system) for our company that was accessible outside our company's firewall.
Fast forward a year, and I thought I'd investigate about using another dedicated Linode to host all my domains, websites, emails, etc.
After a fair bit of researching, I decided to go with it and started an install of Ubuntu with adding ISPConfig on top. It took me a couple of days tinkering around getting it to work how I wanted using a proper SSL certificate provided by an authority, getting a nice version of roundcube working for all the different email accounts on the different domains, etc.
I've been running that now for about a year, have around a dozen websites hosted for myself and some friends. ISPConfig is great in that it allows different levels so I could have a "reseller" set up, but as I'm not a Linux expert and providing support isn't my forte (both in terms of time available and experience), I don't offer any real SLA with the services I provide. Having said that, it's been absolutely flawless and I've extended the services running to now also provide proxy so I can browse the BBC Iplayer when out of the country, and things like that.
I've found that provided you're careful with what you install, how you install it and of course document it properly, it's pretty much trouble-free. I do have backups running so if ever I really make a mess or something terrible happens, I have all the emails, websites, etc, available to restore.
I'm now contemplating upgrading to Ubuntu 14 LTS, and can't decide whether to go for the upgrade or do a full reinstall as there were a few addons I put on and didn't work and not sure they've been cleanly removed, so a bit of spring cleaning won't do any harm. I guess I always have the option of temporarily having a second Linode to play with, get it up and running and then flick the DNS switch when I'm happy...
All in all, I've tried to stick to "if it ain't broke, don't fix it", just ensuring that security patches are frequently applied. I don't host anything super super super confidential, but of course want to keep it relatively safe and secure. I have had the odd question or two on the Linode forums and also on ISPConfig, but have always received great "free" support from the volunteers.