Re: Good char to start?
Basically any character is playable, as your first hardcore character.
Some are "easier" than others, but learning the ways of the game is much more important than being a powerhouse.
If you want to make a summon necromancer, that's cool. They're very fun and very durable. They don't require much gear, they are lag-resistant (if you lag, your minions can usually clear the enemies or slow them down in time for you to discover the problem and bail).
Barbarians are pretty good. Being on the front lines isn't so bad when you have tons of hitpoints. You have to be careful about stat allocation, though. Too much strength leads you with not enough hps (hit points) ---> you die. Not enough strength ---> bad gear ---> you die.
I'd recommend that whatever character class you choose, levels 1-10 you should put nothing but vitality. From then on, every level, put at least 1 point in vitality (usually you put three to five). The extra hps help more than a few extra gear pieces could.
#1 cause of Player vs. Monster death from people new to HC: They don't use potions because they're afraid to waste them. Use potions. They're basically free. Have at least one row of health pots so you don't have to blow full rejuvs to top yourself off.
#2 cause of death: Going too fast. Take your time. When you spot a boss, back up and ID the boss's mods before proceeding. If you stay on your toes with potions, you should only die if you get surrounded or run into an extremely nasty boss pack (cursed, extra strong, extra fast, aura enchanted, etc.). Even if you see an extremely nasty boss pack, there's plenty of time to back up, spread the pack out and pick it apart slowly.
#2.5 cause of death: Speaking of "running" into a dangerous boss pack. Running during combat. Running drops your armor to zero and your chance to block to 1/3rd. Instead, you should walk while fighting if there are enemies trying to hit you. If you have a max block build, running could instantly quadruple or more the damage you're taking.
#3 cause of PvM (Player vs. Monster) death from people new to HC: Not enough vitality. Vit is the only stat worth getting. There are many character builds and stuff that ONLY put points into vit (no strength, no dex). Under no circumstances should you put points into energy (ES sorces are not for new players). Every extra point should go into vit or into dex until you have max block.
#4 cause of death: You don't leave the game. If things get dicey, lag, etc. Alt+f4. Don't ask questions. You can always resummon your skeletons, always fight back through the area (you get more exp that way, anyway). You can always remake your character, but that takes a lot longer

.
I also have to talk about TPPK. Sorry for the lecture, but it's now an unavoidable part of Diablo II online.
I don't recommend Baal runs. Public Baals, there's a tppk (town portal player kill) attempt about every other game. Err, tppk is a hack (99% of the time, it's a hack, some people will point out that if you're extremely fast, you can do it without a hack, but it's still an exploit). They cast a spell in your direction, then make a town portal, go in it, and declare hostility against you. Because of a bug in the gameplay, the spell they cast before going in the portal still exists, and it's now "hostile" to you. The people using this exploit build their characters around knowing this, and their single spell WILL kill your character. Level 45 Sorces can cast Ice Bolt that does close to a thousand PvP damage and is unresistable. And any even low level character, with an Enchant (from a high level sorceress, this boosts their damage) could deliver this fatal attack.
I want to point out that with the hacks, this happens virtually instantly, without warning, and most every character class can do it in some form or another. Even melee characters like Barbs or Paladins could have been enchanted by high level friends, switch to a bow, and kill you faster than your screen can display the incoming missile (let alone before your synapses can comprehend your impending doom).
Not to scare you out of playing hardcore legit (which is the only way to play Diablo II), but if you play in public games, and you aren't running hacks of your own, you will be killed by this method at some point or another. I've seen level 12s kill level 70s with tppks. I've seen level 90s kill level 18s in normal cows.
You can even be killed while in town via some methods, btw. Stay well away from the town entrances.
Yes, it's totally lame.
My advice is only group with people from this site or people that they vouch for. Even then you run some risk (I heard there was a tppk attempt from the xbananax channel), but most people on this site are pretty good, knowledgable, and non-lethal. If you get suspicious, leave.
If you're on USWest, you should switch to USEast. Seriously, USEast is about twice to three times more active. If you're on USEast, I can hook you up with starting gear or even just 10k gold and some luck.
If you're on Europe, stay there. It's pretty active.