I visit quite a few Anglican parishes. I visited one this past Sunday and there was no incense. All the others I've been to have had incense. Is this common in some parishes?
The parish I was a member of when I was an Episcopalian years ago used to do incense once a month on the first Sunday of the month for it's traditional Eucharist service, but not on the other 3-4 Sundays of the month. There was a contemporary service that did not have incense on a regular basis at all. For Christmas, it depended on what time you went- there was a "high" service at 11pm with incense and bells, their highest service of the year in general parish wide, but there were contemporary services with no incense even on Christmas Eve.
In general, I would say "It varies", based on my limited personal experiences. I would imagine there are parishes out there that use incense every Eucharist, parishes that never use incense, and a lot of parishes in between that pull out incense on high holy days like Christmas or special occasions only or otherwise use it only sporadically. It's very much like Roman Catholicism in the United States in that respect.
If it's an important concern for you one way or the other (i.e. You love incense or you have respiratory problems that make incense problematical for you), you could probably call the parish office on a weekday during regular business hours and ask the secretary if they use it and if so, when.
In Roman Catholicism, the ultimate determining factor is the priest. If the priest wants it, it's used that mass. If the priest doesn't want it, it isn't. The priest also has final say over the hymns used and various other factors involving the masses he celebrates. Even associate pastors have a large degree of control. Of course, even for the pastor, it is sometimes wise to go with established traditions at the parish as to not ruffle feathers- just because you can do whatever you want doesn't mean that it's necessarily in the spiritual best interests of the parish to do whatever you want.
I am not sure how Episcopalian and other Anglican provinces handle who gets to decide those type of things. I know that in general terms, in the Episcopal Church, the priest is considered to be in charge of the spiritual affairs of the parish, and the vestry (Elected board of mostly lay people [regular members of the parish]) is considered to be in charge of it's business affairs. So, my guess is that the priest decides whether to use the incense and the vestry decides whether to buy it.

But I think there even more so than in Roman Catholic parishes, what the tradition of the parish is (or a particular service time), and mood of the parishioners attending the services is a big consideration.