I have tried most of the classes, mostly several times in the past. In the past I usually played as far as the desert where I would find the character usually gets stuck (those desert Orc groups of a Leader, three melee, and two archers chew-up my characters, and often spawn 2-3 groups near each other), but when I reinstalled this time I made a whole bunch of starts (about 1.5-2 hours each) and quickly gave up on all bar the Wood Elf.
I quickly gave-up on the Battle Mage (Bronze/clvl7) as I was finding him too hard (fragile + regen times).
The Daemon was strong but I was finding it dull to play (Silver/clvl12). It felt very passive constantly casting a Daemon form, then a buff, and then a spell that feels no different to a buff, then maybe, occasionally, having a few seconds to do something active.
I skipped the Dark Elf.
The Dwarf was OK but I was not overly excited by him (Silver/clvl14). I do not generally enjoy melee-focused characters, and I found his guns less satisfying than bows.
I skipped the Gladiator
I like the idea of the Seraphim (and she is my favourite in Sacred 2) but gave up because I was struggling in Silver Creek (Silver/clvl14). Every group of goblins was causing me to use a health potion or two, so I kept running out (and the store would run out forcing me to backtrack), resulting in me making no progress.
I found the Vampire OK but again not overly excited (Silver/clvl14). Again, I just do not enjoy melee-focused characters. I enjoyed her more than the Dwarf, but I still got bored of pure-melee after a while.
I tried the ReBorn mod, but quickly uninstalled it. They seem to have shifted the balance to suit the most-skilled players, as I kept getting bodied around Bellevue.
I managed to get past the Frost Dragon yesterday. On a hunch I backtracked to Bravemart, spent an hour buying gear with more fire armour (halving my physical armour in the process), then bought a bunch of gear with sockets so I could give myself +16 Penetrating Arrow, which I made into a Combo. The extra armour reduced the Frost Dragon's damage to half my health, and I was doing 1/4 of his every time I used the Combo. The Fire Dragon ended up being trivial, as I had the room to circle him (the Frost Dragon fight was in a narrow corridor) and he only took two of the Combos and a couple of Exploding Arrows. I am just about to enter the Dark Elf city for the third element.
How do you finish the game without fighting the bosses? I know there are optional dragons and things scattered off the main path, which I do intend to skip until later, but I thought these main quest fights were necessary. The way I have been playing is roaming from town-to-town as I follow the main quest, doing most of the side-quests I find there before I move on.