And that's not a bad thing, really - at least those high-level fights are not too easy!

JDD
Doesn't sound that badly spread out. Only thing I can see that doesn't mesh well is Destruction and Archery. If you get Illusion up to 50 and get the Silent Casting perk, Destruction and spells will work MUCH better with your build. Other than that, very similar to what I'm using.
I'm a master of many.
Exactly. It's easy to master at least 1/3 of all skills in Skyrim. I would hardly call that master of none.
I realise you can master multiple perk trees, but you cannot get every single perk in every single tree without multiple playthroughs. Which is the way many people prefer it.
Understood. The language was somewhat ambiguous though, and I definitely don't want anyone to feel discouraged by choosing skills from all three specializations. Not being able to master every skill is a great design choice on Bethesda's part. For one it extends the playability and replayability, and two, it prevents characters from become TOO overpowered (ignoring the crafting trifecta exploits).
JDD
Yeah I like this too, although some trees are very straight forward, and have a nearly linear growth as to what is best to take. Other than that I love the perk and levelling system. Took a lot of what I loved from Fallout 3, and Oblivion and kinda.. Merged it into this beautiful freak baby known as Skyrim.
What I'm doing too! A lot of people miss the "Silent Casting" perk in Illusion!
Archery tree maxed out
Illusion tree maxed out
The necromancy part of the conjuration tree
The light armor side of smithing
All of the enchanting tree besides the recharge perks
Enough in the sneak tree for 3.0x bow sneak damage
Plus most, if not all of the light armor tree
My character "specializes" in archery with conjuration and illusion as backup.
Choosing to get my fill of an abundance of sidequests before tackling anything major was just a choice but had nothing to do with my build, I guess that's what I was trying to say.
Understood. However, I was also referring to the quest lines. I'm intentionally ignoring Companions on my Stealth Mage for instance. That way, playing through on a new character that is more Warrior-esque, I will have new gameplay I didn't see before, in addition to another side of the war, or choosing different quest options, etc etc. I meant THAT as a form of specialization to match your PERK specialization as well. It'll speed up your playthroughs, and be more satisfying to go back to, when you eventually do.
As for not completing quest-lines right away, all the power to you. Nothing wrong with that in my opinion. In fact, it can make more sense than Oblivion, where I was the Arena Champion, Archmage, then decided to be Grandmaster of the Fighter's guild, then joined the Thieve's Guild and became the Gray Fox, and decided to dabble with the Dark Brotherhood. Doing a few quests from each faction, would seem more... Balanced in that sense, so good on you.
I'm also a side-quest-aholic. But shhh.. We have meetings every Thursday!