Among other things, I had more than one lawyer tell me (in so many words) that they hate having engineers on the jury because we tend to look for facts and logic, while the lawyers (especially in tort cases) try to appeal to emotions.
I have done jury duty here in the UK and seen what a jury is like from the inside. I can assure you that the last place you ever want to be is in front of one depending on them reaching a reasoned decision.
Personally speaking I find the whole jury system and the poor way in which scientific, medical and technical evidence is handled by UK courts disgraceful and appalling. It has lead to quite a few well publicised miscarriages of justice and suicides. I really don't know how judges can preside over such a sorry state of affairs and sleep well in their beds at night. The inquisitorial system used throughout much of Europe is far better.