Since SC 2 WoL the game has just gotten better with more community content and arcade games which personally I think is really fun to play.
Units and abilities has been changes in Heart of the Swarm, also new maps are available. The 7 new units (Hellbat, Widow mine, Mothership Core, Oracle, Tempest, viper, Swarm Host) brings more exciting gameplay, strategies and fun to the game.

Call Of Duty games are generally really good games. Black ops is different in that way that you can play versus zombies, which could be fun if you are a zombie kinda guy, which I naturally am.

The graphics of the game has great detail which is very nice and it has a realistic feeling. The mission/story is very good like most COD games has. If you played this game in 3D or something you might actually think you are in the game because the movement of the camera is great.

The snow missions I really like because the snow that falls down is really realistic. The particles(bullets) fired from the weapons is really good also. Another thing that is nice is when you get blown away from a grenade or such the effects is realistic. The fires and smoke at some spots is also realistic which I think is cool. So basicly the physics of the game is pretty good and somewhat realistic.

I really like the guiding system with the dot and the amount of meters you have to walk to reach your destination for the mission to escalate forward. Some slow motion moments are really nice.

SC2 has evolved a lot compared to SC1 in such a way that not only is it more online based but the community can make maps and share it with others, such as arcade games. The mission in the campaign is really interesting because you can actually pick between different mission on a star map. You can also interact with the star ships crew and "talk to them". Of course the talking to the crew is limited and the questions/answers is only predefined.

The missions on the campaign has a really good story and is a lot of fun and interesting to go through. The graphics of course has improved which is great. New units are introduced and most of the old units abilities has changed, which I think is nice. One problem with this game is that it doesn't have some kind of a cloud where your saved games can automatically be uploaded, which would be good if you wanted to play on another computer and pick of where you left.

All and all I think that this game is great and fun!