In the current incarnation of the game, the Candle starsign (and, to a lesser extent, Raven) are extremely powerful compared to any other starsign. The bonus due to Candle is HP regeneration of 2 HP every 12 turns (approximately), which stacks with all racial bonuses and the Healing skill. In fact, the Candle starsign effect is so powerful that it completely dwarfs the effect of the maxed out Healing skill (1 HP every 8 turns). This, combined with a guaranteed extra talent and cheaper prayers, makes Candle the best starsign by a huge margin.

The way that the game stands now, a significant number of players simply reroll their characters repeatedly until they get the Candle starsign because it is so optimal compared to any other choice. Most other starsigns are simply never played. The extra speed and the early rune-covered trident due to Raven is a distant second, still arguably superior to any of the other choices, but not nearly in the same class as Candle.

Recommendations:

-Reduce the effect of the Candle bonus regeneration to 1 HP every 15 turns or so. This would still be a significant benefit to classes/races with poor regeneration or lacking the Healing skill, without being the most dominant effect.
-Reduce the speed bonus of Raven starsign from 10 to 5 speed. This would probably put in more on par with other talents.
-Possibly increase the effects of the weakest starsigns--Tree, Wolf, and Falcon, IMHO.