SS,
That'd be vertigo from 'ground structures', not enjoying horse. It's very strange, flying around anywhere between 500' and 3000' AGL or more and feeling queasy on something 'tall' on the ground. Or with plenty height should one fall.
Although it's boring in a way, planning on having wifey after finishing training and when being at least bit settled (in aviation job) and having some free time for her. Rather than having FT job and then spending free time at the airfield or far away flying XC. That's bad.
So I'd say (besides flying LH airline legs) that being pro saves bit of time for family.
Still to test my theory myself later on.