Sleeping Dogs is meh. Can't even compare it to GTA either. The focus in GTA is guns and cars. The focus in sleeping dogs is martial arts. Try comparing the two. It won't work.
Saints Row 3 sucks. You can't deny it. If you do, you have some sort of Stockholm syndrome going on in your brain. Saints Row 2 was good.
I agree minus the negative insults. I've never really enjoyed the saints row series that much. To me, it seems like an arcade game that you'd play for a few hours every now and then.
GTA games always have me hooked from start to finish and I even play them multiple times.
Sleeping dogs vs. GTA 4 is not a fair comparison like you said. Not to mention that sleeping dogs came out 4 years after GTA 4. Even then, GTA 4 has done some things better. Sleeping dogs has really just stolen some ideas and put them together into a good looking and playing game. The combat is ripped out of batman and the bullet time from max payne.
GTA 4 actually has plenty of side missions in addition to the main story. Whereas sleeping dogs has tacked on missions as dlc (such as those armored police vehicle missions). Not to mention that the world is more open in GTA4 and there's more freedom AND a great multiplayer mode.