Cluster
Wild: base cluster, the original Jamies were this. Usually either majority self-raised or raised by permissive parent figures. Usually hides intelligence mostly because being known to be highly intelligent makes life more boring.
Heir: The heir of an important family, with a lot of responsibility on their shoulders which they can't shrug off. Tend to hide their intelligence significantly less than other clusters.
Experiment: Someone's failed experiment, often Val's. Often has hidden skills, is quite obviously skilled in the areas their creator demanded they be, and frequently deals with self-hatred due to having little control over whichever aspect makes them a 'failed' experiment.
Prisoner: Raised a slave or raised to be married to someone, and/or raised/owned by Das for a significant portion of their life. Most examples of this cluster spend a lot of time locked in their head, and come across as an air-head because of this.

Jamies are also greatly affected by whether they're pre-angelic, angelic, or post-angelic phase - that is to say, whether they've attached themselves to someone(s).