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.

Sep
PoE 3.12 Heist Starter Builds
PoE 3.12 Heist has started, have you decided which build to play? Poe4orbs recommends several builds that are very suitable for starter. These builds can work pretty good with low budget and are very friendly to the starter.

Jan
Best PoE 3.13 Ritual Templar Starter Builds
Many of the builds in this PoE 3.13 Ritual Templar Builds guide are good for starter that are popular with many players. For the three ascendancy classes of Guardian, Hierophant and Inquisitor, the focus of each build is also different. Hope it helps you.

Dec
Real 10% OFF for POE Chaos and Exalted Orbs in Xmas and New Year
How time flies! Christmas is coming again. Guess you guys cannot even wait to celebrate and enjoy this wonderful festival! And we have also prepare gift for all of you!

Dec
Path of Exile Rarity bonuses can actually affect the rarity of the uniques you get
No what this means is you run a map and pay 4 poe chaos orbs or whatever it is to apply nemesis from zanas map device.

Jun
Thoughts on Reworked Charged Dash
Charged Dash is a very practical skill in Path of Exile Incursion league, and I have tried this skill when creating my new build, so I want to share my personal thoughts about Charged Dash, I hope this could be helpful if you guys are going to use this skill too.

Dec
Poe4orbs.Com Announces Availability of POE ORBS & POE Currency for Online Gamers
For gaming enthusiasts of the upcoming Path of Exile Breach, Poe4orbs.Com has stored unlimited number of POE Currency and POE ORBS, and is ready to ship items to gamers anywhere in the world.