Argyle King
Legend
In the past, when DMing, I gave max HP for levels 1-3. After that, you can either roll 1dX or take the average value.
Oh, and btw - CON bonuses only apply once at first level only. Suck on that whilst you tremble with fear when rolling your hit point die. Bwa-hahahahaaaaaa.
Low hp warriors were pretty terrible in B/X and having high variability on hp for otherwise equal fighters was also terrible.