I can easily complete the guild quests/main quest & explore the vast majority of locations in less than 100 hours, This is not "speedrunning" or "playing the game wrongly" as the role players seem to enjoy suggesting but with a sense of purpose & a determination to get things done.
It seems to me that if you don't roleplay or spend an extraordinary amount of time just faffing about catching butterflies then the general consensus is that you're playing it wrong.
Horses for courses, Skyrim for me is a place of beauty & action & i have a responsibility to get things done, For others Skyrim is a nature sim, As a single player experience any style is possible & there is no right or wrong way to do it.
Back to the main point, I would sincerely like there to be some added challenge without the need to completely gimp myself, Adding higher level enemies in the coming DLC would be a great idea.
The op was not talking about "doin main quest and guild quests and explore the vast majority of locations in less than 100 hours"..here was the point on which i've protested.
Reading the thread will help perhaps,at least the Op statements above

However,no one here is in charge to say "what is the right way to play Skyrim" of course...and i've never catched a butterfly in the game for the record

but i've done all the things in the fastest way possible (for me) and no "exploits" of any sort and
i've not "completed" yet all the game in 367 hours and various playtroughs.You can easily understand why i find "Impossible" to doing all the quest in less than 100 hrs from my statement above. You have ? without exploits or other glitches ? i'm free to doubt about that without anything that proves it,and so to doubt about your "style" of playing the game if this were true.
p.s. for "completed" i mean doing all the quests other than take all the trophies/achievements - see above - with the exception of radiant quests of course -a Tes game can't be "completed" in the traditional meaning for various reasons. e.g I have yet to take all the Barenziah Stones without the "help" of the net -just to give you an idea...its easy doin' it with "tricks",try without and you see "How difficult it can be"...its the approach to the game that is different as i've said before.
The developers perhaps have tried to improve exploration and longevity with those (few) difficult quests (even the treasure maps are challenging for that matter)
but of course they can't force players to do these quests in a "regular way" - or to not use fast travel,skip dialogues etc..
