I'll join you in praising Byrne's early X-Men and FF work, but I didn't really care for anything he did later (Alpha Flight, Hulk, Namor, both Avengers teams, ect).John Byrne has had more than a fair share of detractors when he was doing his more traditional superhero work,
I would disagree with these people.
IMO, his run of X-Men with Terry austin and Chris Claremont is still some of the best stuff ever. And Byrne's run on Fantastic Four has some amazing work in it as well.