I did not dig very deep, but I completed a tutorial in all of these. Cobol was not a pleasant experience, I did the Hello World and moved on.

Fortran did not click for me, but I gave it a fair (I think) try, and compared to its abysmal reputation, it was actually fairly nice. At least for the couple of toy programs I wrote in it. Fortran 90 or 95 was a significant improvement on previous versions, as far as I could figure out. But I had no use for it either, so I moved on.

I had to learn Java during my training, around the time I had finally understood the basics of functional programming and Lisp, so I hated Java with fierce passion. ;-)

Sometime after that I took another look at Java and now it wasn't as bad - Generics had been introduced to Java, and I finally had a computer powerful enough to run something like NetBeans or Eclipse. But you know what they say about first impressions. ;-) I don't hate Java, but I am not drawn to it, either.

Sometimes, the experience is very ambiguous, for example with C++. Some people love C++, and I think I can see why they love it. Some people hate C++ passionately, and I can see why they hate it, too. It's weird. (But then, so is C++)