The absolute worst is when there is a ridiculous dialoge tag after every sentence. For example:
QUOTE
"Grandfather? Can't I go to the park today?" queried Ben [you do realize that asked sounds better...::rolls eyes::]
"No," Grandfather replied gruffly.
"Why not?" Ben persisted, his face growing redder by the minute.
"Because I said so? Now leave me alone so that I can work!" shouted Grandfather.
This is [sadly] an example of some horrid ff I've read....::shudders:: the overusage of 'Ben', 'Grandfather' just turns you off

....and also, one is allowed to leave things 'untagged'....or just write 'said'....JK Rowling, for example, does that all the time!
-Ginny, who hates this stuff