I'd rank 'em like this

1. Stunticons
2. Protectobots
3. Seacons
4. Technobots
5. Terrorcons
6. Aerialbots
7. Combaticons

And the last is partly because they are too overused and common. But even as a kid they were the last ones I wanted. In fact I never got any of them (despite having at least two members of every other team) until the RID release.