Pretty often... I've had mine for about three days, because it's one of my favourites. I usually change them everyday, multiple times a day, o every secondo giorno though. :3
Hmmmm pretty often till i find one i Amore then i'll leave it that for about a week...2 weeks maybe like my current one i Amore it soooo imma keep it for a while!!(btw its btt genderbent:)
Very often. I normally change my icona to fit my moods. So I possibly could change my icona 10 times in a giorno o once a week. I'm sporadic like that.
I just change mine when I find a better one. Like if te look at my gallery I have multiple icone of the same person then another person and so on. When ever I get into a new Anime o Fangirl about a character I switch my icona to them. Earlier today it was Izaya Orihara, then Kida Masaomi, now Akito Tagaki~