Here is a little "bio" about types of Runescape accounts and a neat little description.
You may add types of accounts/titles here to to help the list out :)
Mains-
Basically your first account and/or mainly used account. These types of accounts generally consist of all stats being raised and not to uneven stat wise. Mains have access to just about everything in Runescape.
Pures- Pures generally consist of low defence. These accounts should be very good at pking and most pures join clans. Most pures generally favour one stat over the other and train it, while other choose to "hybrid" their stats. The maximum defense acceptable for pures is 20-30. There are some twists like rune pure, zerker, barrows, etc. that require well over 30 defense though,
Types of Pures:
Starting off with type of defencss.
1 Defense: Most commonly used defense level, because well you start off with it! With 1 Defense you can wear iron armour, most robes and clothings.F5 Defense: Pures generally get 5 Defense when they accidentally got defence via whip or mis spec, so they settle for steel armour.10 Defense: 10 Defense is also a pretty good level. At this level you can wear black/white armour and you canw ear the druidic/combat robes for binding.13? Defense: Most pures get 13 defense when they do nature spirit from RFD. Now this allows them to get Rune Gloves which gives more strength bonus.20 Defense: Most pures get 20 Defense for their clan, or better armour. At 20 Defense you can wear mithril armour, mystic robes, and alot more!25 Defense: A few pures get 25 Defense for infinity robes, basically they do this when they are rich and/or maxed :)30 Defense: 30 Defense is for proseylte armour and adamant armour. These accounts are called prossy pures a.k.a Addy Daddys.40 Defense: When somebody gets 40 Defence and generally stays there, then they are a rune pure. There are tons of armour available to you at 40.45 Defense: A spin off from 40 Defense, you basically just do Fremenik Trials and 45 Defence for the Berserker Helmet.70 Defense: At this level of defense, if you played your quests right, you are a barrows pure. This type of "pure" uses barrows armour to pk and what not.Anything above 70 Defense is flat out main material.
On to Attack
1 Attack: People with 1 Attack and 60+ are generally obsidian maulers. These accounts are low leveled but can hit deadly with Obby maul.20 Attack: People with 20 Attack are all for vesta weaopons/statius hammer. Commonly reffered to as vesta pures, these accounts use the weapons given to you in pvp as drops to conquer other pkers.40 Attack: People with 40 Attack are generally F2P Pkers, armed with a rune scimitar/baxe/2h they combo their way to be a good pker.50 Attack: People with 50 Attack gain access to the Granite Maul and Granite Mace, known for the special hit that could 3 hit somebody in under 5 seconds. If they know what they are doing they could be a deadly foe.60 Attack: People with 60 Attack get to use Dragon Weapons! Most of these weaopons have deadly special attacks and are pretty easy to get to. Many accounts get 60 Attack, So much in fact you cant see half of the people with it on the HighScores now.70 Attack: People with 70 Attack either use the whip, or the saradomin sword. These are both the best melee weapons to train with and pretty damn strong too. Careful while using the whip though :)75 Attack: PEople with 75 Attack generally use Godswords, these weapons are slow, but specs are deadly. Watch out for Godsword pkers.
I'll admit i could of ordered these better/described them better but im still working on it.