Personally, for the absolute peace it gives me from seeing God bring things to pass in the exact time frame in which He promised to perform them. This is polar opposite to the effect that my former pre-mill Disp. training gave to me as a child.
I remember one Christmas season when I was a young kid my mother left me alone in a locked car parked in front of the Sears front door while she shopped....for several long, long hours. (Yep, parents could do that back then without getting arrested.) It got to be so long that I was certain that the rapture had occurred and I had been "left behind" to endure the Great Tribulation coming up. I panicked, dreading that I had no way to get home, and no parents waiting on me, even if I did get there. I knew she had left some gospel tracts in the glove box, so I frantically read through them again, trying to see if I had said the wrong words when I prayed to be saved years before. I never told her when she finally finished shopping and got back to the car. Sheer torture for a young kid. And totally unnecessary, since the Great Tribulation is past history, and the rapture Paul wrote about has been greatly misinterpreted.
As a young teen, I used to read books like Larkins' on "The spirit world", or "Holy War" and "The Children's Pilgrim's Progress" by Bunyan, and I became fascinated with the subject. Too much fascinated, because it leaked into my dreams and I began to have nightmares about the Devil. My mom in her way tried to reassure me by quoting, "Greater is He that is in you than he that is in the world". If I had only known then what I know now - that the entire Satanic realm was completely destroyed back in AD 70 - all that teenaged angst and terror concerning a dead foe could have been avoided.
So, again, the main reason for my studying eschatology is for the peace that God gives concerning the future.