You should let the weather guide you. If its a situation too formal to roll sleeves, its too formal for jeans.
If its hot, roll them, not, down. Dressing weather appropriate usually looks better then dressing in a way that makes no sense, which looks... affected.
I'd also avoid the 'below the elbow' roll if your shirt is tucked in. it looks good sitting at a table or for a press photo, but actually walking around, if you cut the sleeves off at the same length as the tucked in shirt, it looks odd. Untucked shirt tieless, by all means do the below elbow roll. But tucked in, if you're rolling roll to the bicep.