This isn't the first time I'm playing solo, but I had some trouble with some specific traps (petrify) I couldn't disarm or avoid.
I've played solo before with a sorceror, cleric and a babarian.
I'm usually a cleric though... or anything that can cast some healing spells.
Finding me in a complete-cleric party (Anomen, Jaheira, Viconia, Aerie) isn't too surprising either.
I recently finished both SOA and TOB with a Berserker/Cleric (dual classed, for a mastery in flails). Besides that, I remember finishing the game also with a Paladin, Mage and Druid. I am still interested to finish the game once with a Bard though. I only finished TOB once.
The class I am most proud of, (and finished the game with for the very first time) was my half-elf Ranger/Cleric. Armed with Daystar and Celestial Fury quite early on proves to be very deadly.
I'm currently with a human dualclassed Ranger/Cleric (armed with the Flail of Ages and Warhammer +2). This one is not a solo-character however. I'm sharing the team with Anomen, Aerie, Viconia, Jan and Nalia. Not really my favorite team, but I already finished the game with my
most favored characters quite recently. (Jaheira, Imoen, Jan, Valygar and Mazzy; though Mazzy and Valygar are quite new there, it's usually Anomen and Viconia instead)
I remember the time when I tried to finish the game with characters I never used before. Quite a pain to use a team of Korgan, Cernd, Haer'Dalis and Nalia (and Jan, but I just lack a decent thief). With nothing specialized, it was harder than I.... hoped for.
As for my solo fighter/thief... I'm currently quite stumped with that maze spell against me all the time. I've got no way to counter it or to avoid it whatsoever. Not only that, but it hits me at quite a bad timing too, considering that there is no way of finding people to join me, or time to spare seeing as I have to go and save Phaere.
This is also one of the first characters I play as a evil character. With a reputation of 1 (!), I am constantly getting attacked by guards and mages from the city, so I just quickly paid the fee to Bayle, (not Bodhi, mind you) so I could leave... of course, after getting my favorite axe and katana.
(with a mastery in both weapons and 3 +'s in two weapon style, doing nearly 17 damage at every hit (and 5% chance of doing 20 electrical damage) and often stunning the opponent, I'm pretty well armed for just about any opponent... until they start casting maze... not to mention that I have yet to deal with our all-time favorite Demi-Lich...
I'm also still interested in killing the only dragon I never managed to kill... the Silver Dragon. I always found it quite annoying. Every dragon has its own powerful ability. The Shadow Dragon with its Dragon Breath, draining a couple of levels and doing every status element damage there is available. Firkraag, the Red Dragon, his enormus fireball which a saving throw can be made against (by all means, Firkraag is IMO the weakest among the dragons) and of course the Black Dragon of Irenicus. I always found it quite poor that it was the only druidic dragon, using entangle and summon insects. If you stay out of its reach, it proves to be even easier than Firkraag. The few dragons in TOB are powerful too, but their dragon breaths are from a different leven than those of SOA. (If you don't know what they are, one is a similar one of Firkraag (but it has an invisible ability), another Druidic dragon (which is not hostile) and (the strongest) is an electrical dragon, which uses a mass-chain-lightning, but by the time you reach that point, enough resistences are available to at least save some unnecessary damage)
The Silver Dragon, however, is on a completely different level. Her dragon breath is a mass petrify, which I dealt with more than once. I never found a real good way to counter or avoid petrify, so I never really dealt with her in combat in an honest way... I would like to try with my solo fighter now though, considering I easily disposed of the Shadow Dragon earlier. I am also very interested in having the blood of the Silver Dragon, I need it to forge a 'powerful' leather armor (mind you, I'm a thief).