When comparing Brainfuck vs J, the Slant community recommends J for most people. In the question“What is the best programming language to learn first?” J is ranked 47th while Brainfuck is ranked 76th. The most important reason people chose J is:
3 classes of operators (verbs, adverbs, and conjunctions) with verbs the most basic function that take either 1 or 2 (infix) parameters. Operators allow function composition with a minimum of parentheses.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Great exercice for your brain
If you ever succeed to use it at least once, whatever it does, you will never be afraid to learn any other programming language.
Pro Very good introduction in geek communities
Say you made a Brainfuck program once, and count how many geeks you will attract.

Pro Designed to challenge and amuse programmers
Rather than have a practical application, Brainfuck is an esoteric language for the purpose of challenging programmers who want to code in a more unusual language.
Pro Every function is an operator
3 classes of operators (verbs, adverbs, and conjunctions) with verbs the most basic function that take either 1 or 2 (infix) parameters. Operators allow function composition with a minimum of parentheses.
Pro Simpler Imperative language constructs as failback to functional programming
J also supports multiline functional definitions similar to BASIC/Pascal. Including error handling.
Pro Compiled language speed from interpreted language.
Each built in operator is a C/asm function, and special code further optimizes some operator combinations. Result is optimized C speed from quick parsing. Array orientation parses and compiles a function once, and applies it to all array items.
Pro 25 year old language, with core unchanged in last 10 years
Still actively developed, but most recent changes have been in libraries and IDE and platform support.
Language is considered "perfected"... though not quite.
Pro Language reference has simple one page index
Complete core programming functional tools allow writting programs and libraries without imports.
Pro No operator precedence rules
(... within each of the 3 operator classes) makes reading code easier. Very simple parsing rules.
Cons
Con Esoteric language
Brainfuck is by design extremely difficult to use. This makes it un-learnable to beginners.
Con Impractical language, used only as a toy
It won't get you a job. It is not used in any practical application.
Con It's a joke language
Con Almost as bad as Python, but less adopted.
It's a joke, just like Python, but at least brainfuck admits it ;-)
Con R-rated name
It's difficult to talk about in polite company.
Con Syntax is pure madness
quicksort=: (($:@(<#[), (=#[), $:@(>#[)) ({~ ?@#)) ^: (1<#)
