Wally it doesn't seem too great a stretch to suggest that a person
can be in a logical, thinking mode some of the time, and in a feeling
'arty' mode at other times - I don't see that one neccessarily
precludes the other.

The MBTI would agree with you - it only establishes a general
preference, not a situational one, and the opposite pole is present and
referred to as the 'shadow'. In the work I've done on creativity, I'd
say that you need both simultaneously. This is particularly the case
with improvising jazz, which was my own profession for years - the
chord structure and available options of substitute chords etc
(thinking) has to be conveyed through an equally important empathy with
the other musicians, "swing" which is a feel thing, and emotion
(feeling). It's also non-verbal and spatial processes predominate (as
the research would confirm). But this is common to all creativity
within art - indeed Rossetti said "fundamental brainwork is what makes
the difference in all art". The exploration may have a "feel"
dimension, especially in a state of flow or 'rumination' as it is
sometimes referred to as, but the myraid decisions and micro decisions
have to have a reasoned artistic place in the whole opus, without which
the process would be merely expressive rather than truly productive