From the TDM-Modpack, I like the Rage, Klingon, Romulan, and the Pyrochette (yes,
I did the Pyrochette's AI, then, if you distrust, I can understand!

).
Also, I like the Cue Cappa Version that "Q" did.
About the Pyrochette:
- They need some time to have competitive ships (they use Missile ships until get Temporal Weapons).
- In the early game they're vulnerable against PPB weapons.
- The way that I found to help them to survive the early game, is researching Mines in the first turns.
- They use Cloaked Attack ships, but for this, those ships doesn't have included minesweepers devices (the minesweeper device doesn't work if the ship is cloaked). It mean that they're vulnerable against mine fields.