When i first started out with lucid dreaming, my lucid dream were pretty long,
I still think my first decent lucid dream is probably the longest one i ever had.
It's also 1 of the 2 only lucid dreams from wich i intentionaly woke myself up.
When i started focusing more on lucid dreaming i started having trouble staying in the dreamworld...

Also, when i tried to hard, i found that my lucid dreams were boring and 'empty'.
I found it better for me to be less aware, then my lucid dreams are much more adventurous and exciting...
Ofcourse i do get carried away in situations sometimes, not completely realising it's a dream... And even losing lucidity again...