Hm, I would probably be between Gears 2 and 3 as my favorite. Hmmm, I'll go with 2.

Gears of War 5 doesn't exist though :P

This is a tough one.. Gears 2 is probably my favourite campaign but I don't know which multiplayer I like best. I suppose Gears of War UE doesn't count but maybe that would be my favourite for online. Superb maps, 60fps, simple and true Gears of War action.

Gears 4 is also 60fps and I'd play it over 3 these days. But 3 had much, much better maps and crazy, quick movement. Both have good campaigns.

Gears 3 is the biggest and the most complete release and hada cool dlc campaign also so it gets my vote.

Gears 2 was the best IMO. Quite a step up from Gears 1 in every way possible.
At the time Gears 3 came out I was a little burned out. When I finally played it about one or two years after release I really liked it. Wasn't quite as memorable though.

Judgment was a really soulless side project. Almost unplayble in singleplayer due to it being nothing more than a few Horde waves before moving on to the next Horde waves.
Gears 4 was a huge step up from Judgment but way below Gears 1-3. Just way too repetitive from start to finish.
Gears 5 back to old glory.

Gears 5 baby. Series evolution in play.

Hmm.. spinoff it was and story felt soulless, but I don't recall there being too many Horde sections. I remember one where you fought a Berserker and waves of enemies,  it was cool. Gameplay was polished and declassified missions added challenge and depth.  

Versus was the main issue. It would have been a very good shooter, as it was quite polished and smooth, but it was just too different for a Gears game. It played like a fast-paced run 'n gun shooter. 

Overrun was brilliant and popular. I played it hundreds of matches. Still can't understand why TC didn't bring it back. But then again, I can hardly understand any of their decisions atm.

I can’t wait for this. I was never a fan of the previous entry but I’ll be among the first to play this on GP. The idea of a detailed 1:1 scale of the planet....I plan to see every country I can think of, and fly over my home town lol. The scale and detail is pure innovation. 

Gears 3 gets my vote.

I didn't even complete the first act but every chapter I played was like this.
Get to point A, prepare for enemies, kill 3 waves, move to point B repeat. There was nothing else. Stopped playing after enduring the same thing 3 or 4 times.

Gears of War 2 best campaign Imo, Gears 3 best overall multiplayer and Judgement with the best MP game mode with Overrun.

Gears 2 for me. I did prefer the mp in 3 though.