Well, in case you didn't notice, I do love me some Penny Arcade. As for favorite strip...jeez, how about all of 2006-2009? Although
The Turkey Trilogy consistently brings me joy.
And Homestarrunner.com pretty much made up my whole middle school experience. With
for kids being my absolute favorite sbemail EVER. (Closely followed by "isp" and "long pants".)
As for TF2, I'm fairly new to it. But it's pretty fantastic. Just everything about it.