Mechanical hands down. Especially #9 lead, mainly because no one else uses it so they can't ask you for lead.
Regular pencils get dull and the size of the lead changes. Plus you have to sharpen.
It makes it so much easier. No losing lead to greedy, yet forgetful, people.I didn't think anyone else used 0.9 lead :'D I always find it funny when people give you death glares when you tell them you can't give them any.
There are tree farms. We aren't really deforesting for paper supplies. The pollution from manufacturing should be the concern.Does anyone here actually care about saving trees?