I really don't see a reason for me to create alts other than for crafting or as a mule. The only time I play my Warrior Priest is when I need to make Talisman. I love playing my Knight and I want to make him the best I can so I play him constantly and I feel like I am missing things when I am not on my Knight. I want to make my Knight the best I can so I want to gain Renown Ranks to up my stats and make him awesome.
The only time I play an alt is in the morning when there is no RvR going on. I have been playing since Dec. right after christmas and I have no other toon above 21. I know a few players who have 3 or more toons at 40. That is just to much lvling for me. I mean I do like lower tier RvR but I love Tier 4. It is just plain fun.
For everyone out there that does like alts I can see your side which is you like to experience everything that the game has to offer. I can understand that but I want to be one of the best Knights on my server so I will stick with him. To each his own so go out there and WAAGH!