Main Similarity and Difference
I as Subject Pronoun
'I' is the subject pronoun, the one performing the action of the verb, so it must be used as a subject in a sentence. Look at the example:
Myself as the Reflexive & Emphatic Pronoun
'Myself' is the reflexive form of the pronoun 'I' and can take two roles in a sentence. It can be:
- Emphatic pronoun
'Myself' is used to emphasize that you did the action with no or little help, not someone else.
- Reflexive pronoun
'Myself' is used when the speaker is the one who receives or is affected by the action of the verb (the subject and object of the verb is the same person).
Don't Use 'Myself' When You Can Use 'I' or 'Me'
Grammar Nazis normally don't accept any sort of use of 'myself' when you can simply use 'I' or 'me'. You can use 'myself' when you have already used 'I' in the same sentence. For example: