Never experienced Crocodiles before....but I used to live in Louisiana and quit often fished on a daily basis. Alligators are VERY common there (you see road kill Gators there like we see road kill Deer) and we would see them while fishing pretty much every day. They aren't aggressive at all. Typically they would see you coming....crawl into the water and swim about 40 feet out....turn and just watch you.
I came across one by...uhh...'accident' once....I was walking along shore fishing and came to a small stand of tall grass It had a narrow ditch in the middle of it about 24" wide, so I took a step back....and jumped through the grass. Guess what was on the other side of the grass about 10 feet away sleeping in the sun? An Alligator about 9 or 10 feet long!! I about SH!T myself...and so did the Alligator
!! We both came about 2 feet off the ground, and were heading in opposite directions as soon as we both hit the ground!!
Goes without sayin'....I'll NEVER forget that encounter! LOL!