Least posting frequency tolerated for this game: 3 times weekly; if in combat, please try to post daily. If you just can't hack that frequency, don't sign up. If you start out tolerating it well, but later on find time constraints to be problematic, please gracefully withdraw, or PM me and we'll figure out a way to believably write your character to the sidelines.
Since this is a Homebrew game, what sort of character sheets will we be using? Well, this is a homebrewed setting, but we'll be using the Dominion Rules, 3rd edition, and there will be a PNG-image character sheet for each player's character. The character sheets will be maintained/updated by the game admin, i.e., Yours Truly; but individual players will be responsible for filling in their own initial character sheet during character creation. Since this PbP site does not have any Dominion Rules character sheet templates, I'll create the sheets myself and host them on my website for viewing.
How long will this campaign run? Only God can see the future, but if my wishes come to fruition, this will be an open-ended campaign. While true that the ultimate goal of the game is to defeat the evil necromancer that resides on the continent of Selkin, reaching that goal will take a long, long, long time. The campaign could run for several years. All creatures, monsters, persons, etc., have a Formidability Rating. The highest F.R. in the game is possessed by the Necromancer, and is 999. Your characters, should they eventually reach such heights of power, will be legendary in prowess and you will be rightfully proud of them.
Can I play more than one character in your game? No. Because of the bookkeeping responsibilities inherent in combat dice-rolling, etc., and because of the need for all players to concentrate of character development, I'd like to limit everyone to a single character apiece. However, be aware that Dominion Rules is a classless system. That means you can turn your character into whatever sort of hero you want -- he or she could eventually be a master painter, expert swordsman, archmage, and cleric of incredible power.
If you ever decide you wish to play a different sort of character, I will encourage you to consider ways to mold your existing character more to your liking; however, I will consider a replacement character. The switch would have to be explained in a believable in-character manner, and the replacement character would have a number of Advancement Points equal to 90% of the total number of APs ever spent on the existing character to improve skills (doesn't consider AP spent on Lucky Breaks). So, for example, if you had an existing character created with 50 APs spent for equipment and skill improvements, and had earned and spent an additional 170 APs during the course of the existing character's career, the new character would have 90% of those 220 APs, or 198 APs. As you can see, in the short run character replacement can quickly give you a completely new character fitting a particular mold; however, in the long run, it is probably best to keep an existing character and simply build upon it in new directions.
How are experience points, or whatever equivalent is used in Dominion Rules, earned, and how often are they distributed? Dominion Rules uses Advancement Points. These are earned from combat, or research, or from quality posting. All three can be sources of Advancement Points. Advancement Points can be spent to improve any skill at all. Everytime I close a thread, I will award Advancement Points to active players. The amount of APs you'll earn will depend upon the number of posts you've made, the depth of those posts, the quality of the writing, and how well your posts have progressed the story and/or enriched the atmosphere of the story.
Advancement Points will, generally, be awarded after each combat scenario, and whenever an IC thread is brought to a close. Your posts will be the richest source of APs, while those gained from combat will be less frequent, yet still important.