Me! Although I'm on the limit between INTJ-T and INTP-T (actually, all letters had varied among tests except for the "I", but INTJ result is the most common for me).
I guess it's like... I love making plans but I don't necessarily follow them lol Mostly due to anxiety or depressive state, or I'm just too tired, so my routine is basically "yeah I have to do this thing planned, but only when I feel like it". But I'm on the extreme of "plotter" type and I hate having to improvise stuff so I guess it's fair to say I'm the J type.
I think we're very different art-wise tho because I use lots of shortcuts LOL. I'm a perfectionist too but I'm trying to act more rationally by considering if the effort to make something "perfect" is really worth it.