Be honest. Given that you're not in crunch mode. Do you actually work 8 hours every day?

I have had some days but usually it's impossible for me to do actual work as a developer for 8 full hours, 5 times a week.

I feel that (without meetings), my ideal schedule for days of normal workload would be 5 hours a day. I'm strictly speaking about focused work, actual programming. Meetings don't usually rack up more than 2-3 hours per week for me.

I do my best to be in the office during the expected hours but I can't help but feel that everything about my engagement, focus and contribution at work would be better if I could just stroll in around 10, well rested, do some actual work, take a short lunch break, go at it again and go home around 15:30...

Because I feel like this I quickly get judgemental about myself if I come in at 9 and leave around 16:30 too often during a work week.

What are your thoughts on this subject?