JimAde: As regards the Aranea; you wouldn't be a full spellcaster, but you *would* have potential to build on your spellcasting, and you'd have decent combat abilities to back up your spells. I wouldn't write it off. Here, have some full stats:
[sblock]
HD: 3d8 (2+Int mod skill points from each one, x4 at first level; class skills Climb, Concentration, Craft, Escape Artist, Jump, Listen, Profession, Spot, BAB +1/1, Strong Fort/Ref saves)
LA: +4
Abilities: +4 dex, +4 con, +4 int, +2 wis, +4 cha.
+1 Natural Armor Bonus
Darkvision 60'.
Speed 50'; Climb 25'
Racial +8 Bonus on Climb check, may always take 10 on climb checks
Automatic Languages: Common, Sylvan
Proficient with Simple Weapons, but no armor or shields.
Bite - natural weapon dealing 1d6 +1.5 str.
Poison: 2d6 Str primary and secondary damage; DC 10 + 1/2 class levels + Con Modifier. Delivered on successful bite.
Spells: As 3rd level Sorceror.
Web: 6/day. 10' range increment, max range 50'. Effective against opponents of up to Large size. A successful hit roots the target in place. They can escape with an Escape Artist Check of DC 10 + Aranea's Con modifier, or a Strength check of DC 14 + Aranea's Con modifier. The web has 0 hardness, 6hp, and takes double damage form fire. Spinning and throwing a web is a Standard Action.
Alternate Form: At will, a hybrid spider/humanoid form or one human form of medium or small size (once chosen the humanoid form cannot be changed). In human form the character cannot use its web or poison abilities. In humanoid form the Aranea keeps its own ability scores, but gains all traits of the alternate form - a dwarven form, for instance, would give +2 Con and -2 Cha, and all other Dwarven traits.[/sblock]
Scotley - sounds great. Swashbuckling Bariaurs = good.
AmorFati - your character scares the living hell out of me. Ummm... in a good way. I think.
Tyler: Don't dismiss Bard Levels, they're awesome! You won't get quite as many skill points that way, it's true... but what you do get is the versatility of having spells (by no means inconsequential; bard spells are very nice), and Bard songs. Bards are a unique and powerful class, particularly if you want to create a flexible, jack-of-all-trades type.
That said... if you want to go for a rogue, that's fine. They're cool too.

I just want to be sure that you're not dismissing the idea of a Bard out of any idea they're weak.
Let me know if you want some choice bardic (or rogueish) abilities from Complete Adventurer sent to you for your perusal.
Changelings:
[sblock]
-Subtype: Changelings are humanoids with the shapechanger subtype.
-Medium Size.
-30' Move
-+2 Racial bonus on saving throws against sleep and charm effects.
-+2 Racial bonus on Bluff, Intimidate, and Sense Motive checks.
-Add Speak Language to the skill list of any class a Changelings adopts.
-Minor Shape Change at Will. Affects self, but no possessions or clothing. Alteration, not illusionary, magic. Otherwise, as the spell
Disguise Self.
-Automatic Languages: Common
-Bonus Languages: Auran, Dwarven, Elven, Giant, Gnome, Halfling, Terran
- Favored Class: Rogue.[/sblock]