I noticed that the Fighter http://www.qcfdesign.com/wiki/DesktopDungeons/index.php?title=Fighter article on the wiki is somewhat brief. I had an urge to see it completed, because lately I've had unexpected success with this class on even some Vicious dungeons, which has lead me to believe that at least I've vastly underestimated it's power (which I now consider to be top tier, not broken but definitely top-notch).
So I did a bit of experimenting. My first theory said that the Fighter is good because it reaches high levels quickly, so those Races would work best that benefit high-level conversions: Halfling, Gnome and Human. I was not overwhealmed by my results, I had especially high hopes for my Gnome Fighter, but I had difficulties getting my character off the ground on early levels. (Human is better, because already at level 2-3 there is some tingling effect from conversions.)
So my next theory was that Fighters - lacking a combat edge initially - benefit most from the Races that reward early conversions, like Elf, Orc and Dwarf. I did have monstrously easy plays at some Vicious PQIs with both the Orc and the Elf, however I had a bit of difficulty with the Dwarf, because although I had the Health, I lacked the damage, so it didn't feel so monstrous as either of the other two Races. Maybe if I can increase damage significantly, Dwarf would still rock, but right now I consider it much weaker than Orc (especially, since boosting damage from 5 to 7 or 10 to 12 feels much bigger than boosting health from 10 to 11). Plus, I kind of have a tendency to pick JJ for my Orc Fighter, because it allows me to just convert something whenever he hits me with Weakness, and thus keep my spirits high, but this makes the poor Dwarf Fighter pale even more in comparison, even if I pick Taurog for him.
Goblin for me is more of a "special interaction", I don't use it a lot, because I'm afraid that despite all the leveling, I will still want to do something, like deal melee damage, etc., and getting a third mid-fight level up from Glyphs seems a bit poorer than getting +10 damage each hit, or +5 mana on each level-up.
So I think that my second theory proves more solid, leading to the final assessment of:
Great: Orc and Elf
Good: Dwarf (should be "great" but I just can't make it work), Human (could be average but still seems to work better than the rest)
Average: Halfling, Gnome, Goblin (the latter with honorable mentions for speedy leveling)
In terms of strategies, I'm usually picking + Damage items to get me off the floor, or + Mana items. With the Elf I prepare Mystera, with the Orc I either prepare Jehora or just leave it up to fate, there are decent deities out there and I can be flexible enough with my choice, practically every deity can be made to work with the Orc.
Thoughts? Comments? Anything I'm missing?