I am a huge fan of Skyrim, and have completed most quests I know of. But when I start again and try to do different approaches, I struggle to create a different way.

So please suggest any build ideas you have, and what their goals and guilds should be.

Please tell me if this is a good one...

Vampire Assassin...

Race: Any...

Standing stone: Ritual...

Vampire Lord...

Armour: Royal Vampire set(Dawnguard)...

Favourite Weapons: Blade of Woe, Auriels Bow(Dawnguard), Chillrend and Windshear....

Favourite Schools of Magic: Conjuration and Illusion...

Favourite Shouts: Slow time, Bend will and Ice form...

Favourite Perk Trees: Conjuration, Illusion, Archery, Sneak, Speech, and Light armour.

>>>I have tried a few different builds but am always drawn back to the Bosmer rogue. Though I did have a surprising amount of fun with an unarmed Khajiit. Their damage bonus makes it viable, and the unarmed kills are hilarious, suplex' and whatnot.

Looks like fun to me.

One of the things I do when planning a character is to think about "needs" and "wants."

"Needs," in terms of gameplay, are the basics. You need some form of protection (armor, mage armor, shield, magic resistance, etc.), some form of offense (weapon, shouts, spells, etc.), and some support skills (crafts, healing, etc.) The choices from those "needs" are the "rough outline" of your character. You think about things like "how will my character fight close-in?," "how will I deal with ranged attackers?," and "how will my character keep health, stamina, and magicka up?" So, if you decide on a lightly armored character who relies on a bow and a dagger, sneaks to avoid detection, and specializes in alchemy for healing and poisons, you have created the "rough outline" of a character.

Now we get to the "wants." This is all about why your character does things, and doesn't do other things. Why does your character want to be an assassin, or a thief, or a battlemage, or a knight in shining armor? Is it because of some particular thing that happened in the past, or because of religious beliefs, or because of a sense of responsibility (or a rebellion against beliefs/responsibilities)? Is the character aware of his/her motivation, or is this something you know that he/she doesn't know? You don't need an elaborate backstory for a character, but I think it helps if you have at least one thing in mind, something that "drives" your character.

Angry ex-slave. Escaped convict. Schoolgirl who has never been this far away from home. Son of a famous healer, who was killed by bandits...

This is the kind of thing that helps to make a character come alive. And I think this is a good way to make the game a lot more replayable.

Old School Wizard.

Destruction, Alteration, Conjuration, Restoration, Illusion (in my case in that order). Anything else magey for flavour, e.g. Enchanting, Alchemy....

No armour.

Given that Smithing + Enchanting makes warrior/rogue types very powerful, I find an old school mage enough of a challenge while remaining fun.

That build should be a good one, or at least I'd think so since it's very similar to builds I've played, although personally I'd want to add something that provided healing like alchemy or restoration.