I usually go Breton by default too. If you want to have a boost to magic go Breton if you want a boost to melee fighting go Redguard.
I was actually going more for a Paladin. You know a spell in one hand and a sword in the other. I was also planning that I could wear light armor since I've never worn light armor on a character except for my mage but he wears robes.
Also, the Redguard's 50% resistance to poison is overwhelmed by the Wood Elf's 50% resistance to both disease and poison. The Bretons I would say have the best racial ability because if you mix it with the atronach stone then you are unstoppable against spells. And they have a 25% resistance to all magic which is extremely useful against mages and dragons. Adrenaline rush is also good but I really don't need it.
I know this isn't any of the two races, but I made a paladin build myself and it worked out great, I used one handed, heavy armor, smithing (just wanted to get some daedric armor), and restoration. my preferred race was Imperials, they had a +5 boost to one handed, heavy armor, and destruction if you want to make it a bit of a battlemage. there is a +10 boost to restoration as well, and that was very useful. If you want to use light armor, you can, the early game boosts don't matter later in the game. you could go Breton for the magic resistance which will be useful for just about anything, but if you want to come out of Helgen with some good damaging capabilities then go Redguard. Breton's racial power is good for fighting mages and dragons, and you can combine it with the Atronach Stone to make yourself temporarily immune to all spells. However, Redguard's racial ability to regenerate Stamina is really good in all fights, so you can power attack your enemies to shreds.
same person from the above post, I played on Expert difficulty with my Paladin build and was level 25 and had a full set of daedric armor, daedric sword, adept-level restoration spell close wounds, 50 one handed, 40 heavy armor, 40 restoration, and 100 smithing. Literally nothing could kill me, if I had low health I just casted close wounds and boom, max health again. took on dragons and dragon priests and came out on top. only stopped cuz I got bored, and wanted to try out another build, I was way over powered. If I had 100 one handed and heavy armor along with 90 restoration, i'd beat the crap out of everything. Actually, I still do.