From what I've read, don't have Athletics as neither Major or Minor, it already raises so quickly just by running around that more is overkill and can in some cases ruin your levelling by making you level too fast to get decent multipliers in anything but Speed.
Illusion increases your Personality multipliers so that half of The Lady won't be too important to you, I'm guessing. The Endurance part is bound to come in useful though, since your character doesn't sound like one that has any major/minor skills that raise it, unlike agility which is going to be sky high with your chosen skills and speed which raises itself thanks to Athletics as I said before. Low speed really should only be a problem for low level heavy armour users, which you're not playing as. My personal choice for your character would be the Lady just for the endurance boost, the extra few HP might save you in those situations where you can't avoid getting hit.
Wow, is athletics really that much faster to increse compared to oblivion?
well thanks for the warning! I won't be taking that one for sure then
How does it sound so far:
Bosmer male-specialized in stealth arts, born under the Lady
Major Skills:
Marksman
Sneak
Illusion
Light Armor
Security
Minor Skills:
Short blade
Acrobatics
Mercantile
Speech Craft
?
Attributes:
Strength 40 (+10 starting bonus?)
Intelligence 40
Willpower 30
Agility 50 (or +10 on agility?)
Speed 50
Endurance 55 (lady bonus)
Personality 65 (lady bonus)
Luck 50 (+10 starting bonus)