I use Comodo Internet Security suite.
The main thing I like about Comodo is the fact that you can control access to your computer and resources. Let's say you install a program on your computer that you downloaded from the internet and don't really know if it should have full access to your machine. With Comodo you can run the application in a sandbox disallowing access to vital system resources.
You can also set the firewall to Custom Policy, prompting you each time a program tries to connect to the internet. Some users like this, other's don't, but if you downloaded a program that shouldn't be sending information to the net, you can block it. You also have the option of allowing 'whitelisted' programs so that all known good applications are allowed to connect and only questionable apps will raise alarm.
The disadvantage of Comodo would have to be constant prompts if you're more hands off. You can set the program to make it's own decisions but you're still going to encounter the occassional prompt for access. This can sometimes get annoying, especially if you have it set to custom policy and are installing a program, you have about 5-15 prompts to allow or deny access to different system resources depending on the installation.
Overall though, I would recommend Comodo due to it's customizable access controls and price tag. It's also very light on system resources itself. You can find all the Comodo free products here
Humans are the only creatures that won't live up to the their potential. Give everything your all. When you die, die on E.
So I ask you, what do you intend to do now?