There is plenty of love for Avira in my camp. It has given me excellent protection. I have tried MSE, AVG, Viper, and Avast. All of those cause my computer to to hang slightly at times and start up significantly slower. I cannot stand that. The only way that I know Avira is running, is I never have viruses or other malware and I see it's icon on the toolbar. I do admit that I have had a few false positives, but I have experienced no catastrophic system failures or malfunctions even after I quarantined some things that I should not have. The updater is much smoother these days and I killed the splash screen. I still get the nag screen once in a while, but it does not bother me. I am used to it.
IMHO, Avira 10 free edition is solid protection that does not cost me a dime.
If Avira ever stops offering the free version, I will buy it. I have no desire to have a suite like NIS or KIS. I have a quasi suite. By the way Senexx......great question