Bacris said:I don't see anything wrong with planning a character out early - but it needs to have room for change if situations change.
For example, if your first level is rogue and, after a couple sessions of playing, the whole career path of rogue into whatever PrC you chose just doesn't look good, there's nothing that says "I must stick to what I planned!"
Just like you planned to study physics and discovered it just wasn't what you were looking for, your characters can have plans that change. You still originally planned to be a physicist, just like a character may have planned to grow up and be a Incantatrix only to discover that magic just wasn't fun for them.
DonTadow said:Hey its there character. Why should I the DM place rules on how far in advance someone wants to think.
Jürgen Hubert said:Unfortunately, this will then mean that you will have a hard time meeting the prerequisites for other interesting prestige classes which might interest your character now. Feats, especially, tend to be problematic because you get so few of them.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.