I started off liking fairy tail because my wife made me watch it, I am a big One Piece, tokyo ghoul and death note fan, but I really liked fairy tail right until the end of edolas arc. (although there are some things that made me scratch my head from the earlier chapters)
thats when it went downhill for me.
i really liked how fairy tail started off, but there are tons of things that made me dislike the series, and i dont like how it seems that mashima thinks his fans are dumb and illogical that he can get away with gags and fanservice.
i could list tons of things that made me go away from fairy tail and its just the fanservice (seven deadly sins got buttloads of fanservice but you would overlook it because of the great story and well developed characters)
i also cant deny fairy tail ripping off one piece and now naruto, granted that one piece also got inspirations from disney and other stuff but the characters are used very well unlike fairy tail who just copy things just to copy things.
i wont deny mashima is a beast on releasing 3-4 chapters a week and he got great art, i give him that, but great art only gets you so far, that doesnt make a series great. if youre a child yeah, you would always fangasm over great art, but as a manga fan, it should be more than great art and voluptous girls.