I have found wood elves are resistant to desease and poison.
Since I mainly play a wood elf character.
My favourite and most favoured style is Assassin/theif .
I love that style...
Let's review your style of gameplay and how you mix in your race with that style?
Would be cool to know that wood elves are the most best style for assassin/theif .
Well, I really have never matched my race with my game style, except for mage with High Elf, because if I have to stare at this character for HOURS on end, and I've invested over 400 hours in this game, it better look somewhat pleasing to the eye. And the only female I could get to be beautiful, to my standards, was the High Elf. And yes she is really ugly when you look at her in the beginning of making your character, but with about 40 minutes of work they turn out to be very pretty, more so than the others in my opinion, and all my friends love her. Plus you are taller than EVERYONE, tallest race there is. I like looking down on all the characters, except fellow High Elves, and them looking up at me lol. It makes me feel like my character is tougher and more intimidating. Especially when those buff nords only reach my shoulder, it's funny. Some people think because the High Elves are taller they jump and run slightly higher/faster, and have posted their results of testing this out. But to me, I don't care that much about that to find out.
Anyhow. I normally pick High Elf for only these two reasons: Head start in enchanting and the 50 bonus magika automatically give to you. Aside from getting any perks, it's already as if you have grown 5 levels. You can't beat that in my opinion. No other race starts with that type of advantage. Since I normally put 0 levels into magika, that really helps me out for healing spells. Although, magic resistance for Breton though is pretty helpful, but enchantments can cover that on other races.
I've never been one to go and look at all the skills they get a few points extra in (like Sneak at 20 instead of 15), because ultimately that doesn't really matter, plus it gets in the way of perks early on. It will help you right in the beginning, and then that's it. As far as the powers each race gets, I always forget about them and never use them anyway, until I was a mage and trying to level up Conjuration, the High Elf power was VERY helpful. I could cast like a hundred spells in so little time and get those skills up fast. But, in my opinion, once you hit level 25 or 30, there's no use for them anymore because you're so powerful.
So, like I said, I don't match it up normally. So my current High Elf is playing a one handed/shield and archer game style, and she is a thief/assassin and does what she wants. No mercy and she's a complete smart ass most of the time. Of course she uses sneak, as do all my other characters, I can't help it. That sneak bonus is fantastic plus you get a head start in planning. I might throw in conjuration for her later on to get some thralls with her. I've played mage and all the other stuff, but this is my current character. This time, I'm not going vampire, but werewolf with the Companions.
Oh, with the poison and disease resistance, I just become either a werewolf or vampire, and problem solved. But if you don't want to do either one of those things, which I will never understand, it's so fun, then yes you won't get that. Plus with the vampire, instant and unlimited night vision. I don't use it that much, but it is handy for those really dark places in caves. But since the whole vamp thing can be a pain in the ass, I've only done it with two of my characters (that sneak bonus is nice). So I don't let those types of things control my race choice.
Anyways, this is turning out to be a really long response, sorry! But, to wrap it up, my favorite style is also Assassin/thief because it's just badass and I get to use sneak a lot to take things slow if I prefer. My favorite fighting style would have to be archery in the end, especially with a legendary Daedric Bow with absorb health and chance to paralyze. The minute I enter a cave I just start picking them off one by one, especially once you get those slow time perks. It's just fun. They normally don't find you, and you have already slaughtered them all before you even took two steps!
Oh, and I also used Woodelf for my first archer, and I really liked them too. That would have to be my second favorite race. And they really do get a big bonus with the archery, at 25 I think right? But, like you said too, it can get away of leveling up quick and getting those perks.