When i'm tanking i'll start with a single pull or sometimes a double depending on the dungeon. Just to see see what the healer does. If my hp drops to dangerous levels and I have to start using cooldowns, i'll maintain that pace throughout the dungeon. If my hp stays high i'll pull more. If a dps doesn't like my pace and starts pulling ahead of me, I let them tank whatever they pulled until they die. If the healer starts healing the dps wannabetank i'll let them know what's up. The dps usually learns their lesson pretty quick.