I'm thinking of a build like this: http://au.ign.com/builds/the-elder-scrolls-5-skyrim/create?d=0000000000000000001011111111111111111110001111121212111111111011111112001013111113
I don't know what perks are worth getting and which ones are not so I just chose perks that I think would fit my role-playing as I have never made a mage.
Now the actual problem is that I cannot decide on how I want to role-play this character. I prefer to be a good person and help people as I feel there is more to do and I like the rewarding feeling when you help someone but I also want to do the Daedric quests as I haven't tried them (and want the trophy) but it may seem evil and wouldn't fit the whole 'good' character. I will also be doing necromancy and summoning which I think may be considered evil as well. I'm also an Altmer which a lot of people think are arrogant and Thalmor bigots.
Anyway I want to be a good person and help out people but I also want to do Daedric quests and necromancy/summoning. How could I role-play this character? I was thinking of trying the neutral approach and doing everything but I can't think of any ideas on how to role-play it. I was thinking of making this pure mage a character that does everything in the game but some things may not fit in well like the Companions. I want to make him a good person who helps people but also does the Daedric quests. I was even thinking of being a good person and joining the Dark Brotherhood as well.
I just don't know how to role-play my character and would love some ideas to inspire me to play. I want to make this character but I just can't decide on his alignment.
Maybe the idea of being a nice helpful person but he is frowned upon for being a High Elf and everyone thinks he's a Thalmor or bad person. He tries his best to help out but everyone still shuns him. So he begins to become evil and join or help people who accept his power or something. I don't really know because I can't think of how I can do everything and role-play it.
Thanks.

but anyways. Good luck my friend, I too role-play and have difficulty justifying actions, and thus don't do all the quests on any one character, but I'm sure you'll figure it out ^^