Smart minds think alike. I like Emsisoft over Norton, even with Emsisoft FP's, bugs and some strange slowdown issues I've seen in the past.I switch between 3 av's from time to time
Norton Security because it's ultralight and best web protection for me
Gdata AV/IS because dual engine and very good behavior blocker
Bullguard IS because light and with bitdefender signatures
Gdata - for your reasons, but also the decent firewall, clean interface and no bloat. (Good privacy too)
Bullguard - this thing is light as a feather, I agree, also the new firewall is pretty robust. (GREAT privacy)
Emsisoft - my third choice, instead of Norton. Mostly for privacy reasons, but good web filter, dual engines and nice BB. (Even greater privacy)
For free - I think FortiClient is the best, especially with all of the extra modules in the free version enabled like Advanced Threat Detection, Anti-Exploit, etc.