>>So now I'm wondering do I have a way too controlling BF, or is it me who's being such a bitch to go take a tattoo without spouse's permission<<
Neither. He's not controlling you - controlling you would have been him forbidding you to get the tattoo. And you don't need his permission.
Anyway, I agree with Backup that he can't help his feelings. You can do what you like to your body - but he doesn't have to like the result.
As for him not engaging in the discussion earlier, this was him not being controlling. If he was a controlling type, he would have made his feelings very clear. Anyway, it's not rocket science to figure out if someone says nothing, it means they don't like the idea. I mean, given his silence on the topic and not being fond of your other tattoo, you didn't REALLY expect him to like it did you?
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.