If it's good, it will just pull you along. You don't know until you try. I tried to read Wuthering Heights in my teens, and I left it unfinished because its central characters became too unbearable. But some people love it. If you like to read for pleasure then there are bound to be some long books that work for you.
By that token, some of my favorite long books aren't for everyone. No use arguing matters of taste. Stephen King - The Stand; Dostoyevsky - The Brothers Karamazov; Thomas Wolfe - Look Homeward, Angel