I still use it. I always hear these raving praises for IntelliJ so I guess I have to force myself to move to IntelliJ. I tried a couple of times, but always fell back to Eclipse due to familiarity.
What do you think is the biggest difference between the two?
I suggest giving IntelliJ a shot but, honestly, if you prefer Eclipse then stick with it. I originally switched because at the time IntelliJ had better code navigation, better version control support, better static analysis support, and an overall much better aesthetic IMO (especially in dark mode). Things might have improved in Eclipse since then, but I haven't tried it in a long time. I think the last Eclipse version I used was Juno.
I do a lot more Python work than Java nowadays so I use PyCharm much more than IntelliJ, though they share a lot in common. Aside from those, the only IDE I really ever use is GNAT Studio for work. I suppose I used Android Studio for a while, but that's basically just IntelliJ with some Android-specific features bolted on.
What do you think is the biggest difference between the two?