Depends on how you're going to be entering data. For example, a free String field can be tied to a Select box on a form, giving you essentially unlimited (2 billion) possible dropdown options. But synchronizing with an SFDC restricted picklist, on the other hand, limits you in practice to their max of 1000 (IIRC).
What are the means/interfaces through which you'll be populating the field?
Depends on how you're going to be entering data. For example, a free String field can be tied to a Select box on a form, giving you essentially unlimited (2 billion) possible dropdown options. But synchronizing with an SFDC restricted picklist, on the other hand, limits you in practice to their max of 1000 (IIRC).
What are the means/interfaces through which you'll be populating the field?
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