95% of builds on Path of Exile scale with special uniques or powerful rares
The reason it is still fun after 20+ hours of play is because of the skill and gear progression that comes with most builds in the game. 95% of builds on PoE scale with special uniques or powerful rares as well as getting gear that has more linked sockets (5 socketed and linked sockets on gear are a lot more rare than 4 linked gear, and 6 linked gear extremely rare and endgame to acheive in most cases). Both of these will change will change how the skill works/increase their damage output significantly, making you want to progress even more to see how far you can take a build idea.
So the long and short of it is yes in it's most basic form the fun of playing the same skill over a long period is to see the returns of your investment into the skill and seeing how far you can take it, which is much more rewarding than it sounds due to the sheer complexity and number of options the game has to offer.

Oct
Path of Exile Useful Tips 04 - How Upgrade Your Gear With Prophecy
Hi, here is Poe4orbs. Today, we will share you how to use the prophecy upgrade gear in path of exile.

Jun
[3.11] PoE Harvest Mauarder Starter Endgame Builds
Here is the latest PoE 3.11 Harvest Mauarder Starter Endgame Builds - Berserker, Chieftain and Juggernaut. Whether you like cheap, fast mapping, or boss killer, you can find the build you want.

Dec
I wish the community of Path of Exile had been smart
I mean sure, if you bought a ton of extra stash tabs and can physically hold that much poe currency, go ahead.

Jan
Several players have thoughts about how to shape your Atlas in Path of Exile 2.5.1
I think the goal would be to run the maps and not kill the boss, to be honest I forgot a bit because I bought 20 shaped Ashen woods to start and built a base off that. As long as you don't kill the boss it shouldn't show up on your atlas.

Oct
Same with giving Path of Exile bosses a resolve bar
A voidheart jugg will lose some damage but not really care that hydra is poison immune, a Path of Exile chaos barrage or spectral throw will be able to kill hydra but will have to actually play the game

Dec
On the topic of sin's Rebirth Path of Exile
There's a point to be made about having 55%(or more based on flask effectiveness) phys as extra chaos at the press of two buttons.