Hi Sophia
In the late 1980s I replaced a guitarist in a Jazz trio, and the bass player told me that whilst the guitarist was a very good player in many ways, he had a weird rhythmic sense. They had spent quite a few months rehearsing and had failed to get one song completed to a high enough standard to play at a gig.
The guitarist's problem was that he tapped his foot to keep time (as a lot of people do), however he didn't tap the beat (i.e. 4 to the bar or whatever), he tapped the rhythm of the melody. This meant he was forever going out of time with the bass and drums. So whilst he could play clever solos and intricate chord patterns on the guitar, it was all wasted as he couldn't keep time, which is quite a unique handicap in my experience.
So I replaced him on Piano, and whilst I'm not a proper Jazz Pianist and my improvising skills are very limited, I can normally keep time.
Again, sorry, off topic but it shows how different we all are.
Cheers