My handwriting is appalling (and has become worse since I starting using computers) owing to being mixed up with my elder brother at birth (he is a doctor but writes very neatly, so clearly I was supposed to be him and he me). As a result my log book looks frightful, especially around the entry for first solo: I knew that this must, by time-honoured tradition, be written in red and used a splodgy red map pen which had adverse effects on the surrounding pages. One of my instructors told me off for the state of the logbook late in the course, pointing out that the CAA might quibble with entries that they couldn't read, but in the event they nodded it through. Nowadays I try to keep it a bit neater, and instead get in trouble for horrid scrawl on our aircraft's fiendishly complex tech log, which usually takes a period of time greater than the max fuel endurance to fill in.