I use We Host Your Info. There great! They have a nice free package and the price of there paid packages is exceptional considering how much space you get. I love them and that's were I'm hosting my new forum. 🙂
I use Go Daddy. They are the only paid host I've ever used. Been with them nearly 4 years and never seen a reason to change. I can count on one hand how many times they've been down. Not to mention it's not long when it did happen. Never had any problems whatsoever. They're priced well too. Love them.
I use IPBFree because they are very customizable and I don't have to worry about getting a server and hosting my own community because they take care of all of that.
My actual web host is 1&1. They have treated me well as far as domains and email accounts.
I'm currently hosting my board on HostGator, there support have been good thusfar. Some were more capable than others. You could clearly see the difference between 'general support staff' and more 'advanced support staff', but they interact good with eachother.
I use Sitefrost. They're Post-To-Host, and I have to make 25 posts a month for cPanel hosting for 3GB Disk Space and 30GB Monthly Bandwidth Transfer (which, so far, I've only used a portion of). They recently suffered downtime, but my website was not at all affected.