I have four, but the last one took... 6-8 hours. Much longer than my other three, which are comparatively small and took less than an hour each. Since then, I think of tattoos in hours - because someone putting 12 hours into a huge backpiece says more than "1 tattoo". Give a better idea of how much a person has, I think.
Haha, I was in the lobby and overheard someone asking about a tiny tattoo of a dot, like the size of a "." just so they could say they had a tattoo.
And I'm getting another in March, which will probably take some time, too.
I'd always liked tattoos, but it took me about eight years to decide on my first one. After that, I somehow became a lot more in tune with what I wanted and had a better idea how to go about it.
It various from person-to-person, but for me it didn't really hurt. How much it itches while healing was actually the "worst" part for me.