I have used cedar, and long matches that I let burn off a bit to not impart their taste. Mostly, though, a very clean burning torch lighter (usually a dupont) if outside, or a soft flame lighter inside. Never, ever, a zippo.
I enjoy some davidoffs, the robusto intenso was nice, and I smoked a very large, very old cigar a few months ago...I actually dont' know what it was, perhaps in Double Robusto size, it was wonderful, but probably had a decade of age on it. I also recently finished my last 1982 No 2's. They were delicious, though very light and mild. They had been in the same humidor in London since they were exported, and I bought them in perhaps 2005. Of course, those are not the Davidoffs being discussed here.
As for Cohiba...my favorites. My last box of 2006 Siglo 4's was opened last month. I should have bought more, as I feel that they are the best of the recent offerings of that size. I will have to force myself to save them for times I can really savor them.