What is the most boring thing in chess?

There is nothing boring about Chess .

I hate it when my oppenent keeps puting me in check over and over again.

Rook vs. knight endgame where opponent refuses to accept draw.

waiting for the opponent to move

after one takes a queen with another queen early in the game, the rest of the game becomes dull.

then, there is less scope left for good tactical game.

Your opponent repetitively offering draws when they have a clearly lost position.

 that not the most boring thing but it is the most aggravating thing someone can do

i think the most boring things in chess are the players!

no way chess player rule, we think about useless things like color complexes, waste our time playing a game we can never master, revere people that devote their lives in pursuit of achieving an impossible dream of creating a beautiful work of art that only a small percent of the populatoin can even appreciate, for very little money, and is of no consequence to the world in general.  our attempts to legitimize this game, our holy grail, we pompusly abhor the plebian masses who ignorantly live thier lives without knowing what it is to behold a brilliant Tal sacrifice, or appreciate an artfuly played bronstein midgame, or wonder at the beautiful, natural simplisity of a Capa endgame.  we brag about our esorteric understanding of a lucean position, or that we have 400 opening variations memorized til at least move 10, we can calculate variations and "see" 15 moves deep, we can speak of Nimzowitsch's "Hypermodern" revolution or Fischer singlehandly taking on the soviet chess machien, heck just en passant is enough to baffle the philistine masses...in the end its just a game that we take way too seriously and i wouldt have it anyother way

okay then maybe the fact that chess is all in black and white

Absolutely right!

maybe it is the sitting there doing nothing during the 2.5 hours the opponent to make his moves.

losing a game is most boring & frustrating...

the most boring thing in chess is having to resist the  temptation of shouting "charge" and tipping the board so that your pieces go crashing into your opponent's

People trying to dictate how their opponents should play (trading too much / not trading enough / not resigning early enough / resigning too early / etc etc etc).

Yeah, definitely some chess books.

 amen brother preach on!  i play the french and i cannot stand playing the exchange variation...same with the caro-kan, queensgambit any of em!

when your opponent in OTB spends 20 minutes thinking of an obvious move in an common opening

waiting and waiting for my opponent to make their move and then at the last minute, they go on vacation time.