I've said before that you could probably make a credible case for any of the MGS games being the best in the series but if you don't think 3 has the best bosses you are objectively wrong.
I'd honestly say that MGS3 has some of the best bosses in all of video games. The topic of boss fights came up on a bombcast a couple weeks back and I don't remember Dan repping MGS3 which I thought was weird at the time.
Definitely. Mgs peace walker had the worst bosses.
This is one of the main reasons why I don't like Peace Walker. Personally, for me, MGS bosses are a key factor of my enjoyment of the series. I always anticipate what the next boss will be. Hell, Portable Ops was even pretty OK with weird boss fights.
Peace Walker wasn't even average, it has probably the most boring and tedious bosses that I've ever seen. I had to look up what happens at the end of PW because I just couldn't stand playing it anymore. Every other MGS I've beaten like 6 times each. I also don't like the story in PW at all and how poorly they handle The Boss's precious legacy and none of the new characters were interesting to me. Ground Zeroes actually made me appreciate the PW characters a bit more though.
Also: Portable Ops > Peace Walker