User blog comment:B214/Talk About What You Want! 2/@comment-74.77.52.225-20140801025045/@comment-1359322-20140802024428

Ok, just see it this way. Issei has 10,000+ years to live. And the goals that Issei has right now and some extra i added are:


 * 1) Becoming a Harem King (He already has the girls)
 * 2) Help Rias become the Rating Game Champion
 * 3) Becoming the Ultimate Pawn
 * 4) Form his own peerage.
 * 5) Continue his Oppai Dragon campaign
 * 6) Enter and win a few titles in Rating Games

Among those, Issei already cleared no. 1 & 5, he's on his way to the other goals as well. Now for no. 2, knowing the strength of Rias' team, it'll probably take them 50-60 years to attain that goal, and Issei can become the Ultimate Pawn in that time too. Then for his peerage and territory and all, yes he can form it almost immediately, maybe in 4-5 years? And after that he can straight enter Rating Game, and maybe in another 5-7 years, Issei would finish goal no. 6 as well. All those could easily be done in less than 100 years, but then what's left for Issei after that? He'll be left without his goals, and like Okita said, burn out as a Devil. So instead of just rushing things up, the smart thing to do for Issei is to take a slow pace, that way, he can see new goals he wants while slowly achieving his current goals. It's way better than rushing all done, then become goalless for the rest of his eternal life.