Tonight I hold Session 2 of my KotB campaign.
Not sure how many of my players are going to turn up or if they are just coming for the KFC.
From my recent musings on XP and level advancement - it all depends on what incentives the DM wants in his/her campaign.
Monster killing = more XP for monsters
Exploring = more XP from treasure
Good role playing = XP for role playing
Getting into the action and not holding back = Alexis
Turning up to each session = level advancement for sessions played eg Old School Psionics
Turning up to each session but with a random advancement = roll to advance level system from
Since my campaign is not going to be long I want to incentivise turning up for each session but keep a random element. Therefore I have decided on the last option except I favour a 2d6 system.
2d6 feels more B/X
2d6 does not have a flat probability curve like a d20 increasing 5% per level
2d6 makes intelligence bonuses for XP more effective - it will never be a dump stat again with this system. No need for XP bonus in percent from intelligence just use the straight bonus!
My system (rough and being tested first tonight)
Level 1 advancement rolled at the end of each session
Cleric and Thief 10 on 2d6
Fighter 11 on 2d6
Dwarf, Halfling and Magic User 12 on 2d6
Elf 13 on 2d6
+1 per session played (DM may award only 1/4 or 1/2 bonus instead of +1 at DM's discretion per session)
+1 bonus for each level the median party level is above the character (this allows more rapid catch up and could be explained by mentoring of the lower level character)
- 2 if hireling or retainer
For levels above 2, I am yet to decide but I suspect I will just add 1 to the roll required.