I've had ideas for a tattoo before, but usually they're fleeting. This one has actually stuck with me for several months.
It's the word 'imagine', with the first i replaced by a semi-colon. The letters are also windows, with clouds on the other side. I've got an example of what it might look like below.
The location would be on my right forearm, on the inside of the arm. I'm not sure how big it would have to be in order to get the clouds visible through them. Maybe up to the elbow.