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.

Apr
PoE 3.14 Ultimatum Top Ranger Starter Builds
Poe4orb has also prepared the latest PoE 3.14 Ultimatum Top Ranger Starter Builds collection. Check out these most popular ultimatum builds of Deadeye, Pathfinder and Raider now!

Mar
The Most Well-liked PoE 3.2 Builds in Bestiary League
PoE 3.2: The Bestiary league and Hardcore Bestiary league would be the upcoming challenge leagues. PoE 3.2 released on March 2, 2018. Within this Post, PoeCurrencyBuy will share Probably the most Well-known PoE 3.2 Builds for you personally.

Oct
This is my honest feedback - Path of Exile Designers
This game has a unique feel and it is not easy to offer a self contained and well defined experience nowadays. Path of Exile is grim, compelling and harsh, in a good way.

Oct
GGG want to force us to trade
So much stuff in POE we take for granted was so fun to discover. Figuring out how to change my skills using support gems was amazing.

Mar
PoE 3.14 Ultimatum Livestream Announcement
PoE 3.14 Ultimatum League Livestream at 1pm on April 8th (PDT). Don't forget Twitch Drops will be enabled from the start of the livestream until 9pm April 8th (PDT)

Sep
poe4orbs:[Lake of Kalandra] PoE 3.19 Raider Lightning Strike League Starter Build
If you are looking for a starter build that can (very) quickly farm high level maps to progress your Atlas then this PoE 3.19 Raider Lightning Strike League Starter Build might be right for you