same problem here. sometimes when i am lucid, i am bored to stay lucid and i try to wake myself up. during my first LDs, my head was near to smoke because of heavy mental activity. in my intention i like to have LD every night but in reality, when i have an LD, i hate to have it very soon again...because i feel tired of having another one...i kinda become full enough of it.....I thought it only happens for me but i see you have the same problem too. but trying to have LD is not boring for me and i like LD exercises more than LD itself.