I love the Halo figures McFarlane makes! I just wish they were in scale with other lines. They're around 5 inch's tall but the Spartans are around 7 feet tall (Master Chief is 6'11 without Armor and 7'2 with Armor) so they won't fit with 4 inch figures nor 6 inch figures. I'm a HUGE fan of the games and all I've did is play Halo 4 since I've been off from work so I love the Series. They figures are made well and have good articulation but I wish someone besides McFarlane had the licence.
The Walking Dead figures are cool, for displaying that is. I have most of them but I just use them as Display only. They are in scale with the old Toy Biz Resident Evil figures though, so that's cool. They have terrible articulation though....just awful. It's hard to believe so many joints could be so useless.
McFarlane is so weird when it comes to the scale they use. The first series of Halo figures aren't even in scale with their later series, wtf! The Walking Dead figures fit with nothing but 5 inch figures and Halo fits with nothing but Halo and even then sometimes they aren't even in scale. I really wish Neca had the licence for Hasbro.