Maybe I'll get down voted but I really think perl 4.036 was the best perl. It was already weird with all the $this and @that but it was such a pleasant language that when I was at Sun I proposed rewriting a pile of /usr/bin in perl. We had already made stuff slow as crap with unicode support so why not? Didn't happen, Sun pulled the unicode support to get back C level perf.
Call me crazy, I love me some perl 4. That release was brilliant.
I've never heard him suggest that it was a mistake to build on Perl 4 to get to Perl 5. Which implies that he considered it worth A) continuing to evolve Perl and B) building directly on the language design and implementation of Perl 4. But aiui, when the mug smashed in 2000, he quite literally instantly seized on the notion of more or less starting over in regard to language design, compiler implementation (and, very importantly, the cultural vibe), for Perl 6.
Call me crazy, I love me some perl 4. That release was brilliant.