Lisa Poisso of WoW Insider asked how many characters one actively plays. My answer to this would of course include my main, who however suffers in the amount of attention when her only activity is weekly guild raids. As I am now able to work on my missing achievements on any character, the necessity to do it with Nicasia is no longer there, and some of my alts, such as Vladan, are much more suitable for soloing things. This I allow myself, because it helps me not get bored with elemental shaman after playing it as main since late Wrath of the Lich King.
In addition to Nica, I'd say I play 2-3 alts actively, one of them being Horde at the moment. But this varies greatly from day to day and week to week.