My character is specialized in combat. I'm thinking about "warrior" and "lady" +10 damage is great but +25 Endurance (great for HP!) and +25 for personality is cool too! I'm undecided. What's your favourite sign?

The Lady is always a good pick. The warrior would also be good. I choose 'the steed' for my Nord because I was tired of slowly moving about the country.

One thing to consider though - eventually you`ll get your main stats up to 100. Try to pick a sign that will still benefit you after that. The warrior would be good as it always fortifies attack. The Lady might not be so benefical because you`ll be rapidly gaining Endurance as a warrior anyway, but the Personality is always handy.

yes but it will take a long time to buff all my abilties to 100. The problem is, I dont know what will happen in future I mean if I strike 200-300 damage in future so +10 damage is nothing. but if damage range is between 50-60, +10 is great. any more comments?

I'd say the warrior: endurance is great, and since it concurs in hp gain, it will help you gain more of that if it starts up high. Personality isn't that useful for a warrior in general, since it affects only your relationship towards people - relationship which can be boosted by bribes. However an attack bonus is something you will always benefit of, while endurance and personality can be maxed out in a short time... so I'd choose warrior.

seriously, the lady is good only in the beginning. but the advantage wear off after some time.

Try the apperentice, it give your extra magicka (intelligent x 1.5) .
so if you got 100 intelligent, you'll have a total of 250 magicka.

don't worry about the -50% to magicka resistance, if you follow main quest you'll get a item that give constant magicka resistant.