While I can't guarantee that using certain characters will make others think you're special, I can provide a list of special characters that are commonly used in emails to add emphasis, organize information, or create visual interest. Here are some examples:

• ! (exclamation point) - often used to convey excitement or urgency
• ? (question mark) - used to ask questions or indicate uncertainty
• @ (at symbol) - used to mention or address someone directly

• (hashtag) - used to categorize or group related content

• $ (dollar sign) - used to represent currency or monetary values
• % (percent sign) - used to represent a percentage or proportion
• ^ (caret) - used to indicate an insertion or addition
• & (ampersand) - used to represent "and" or connect related items
• • (asterisk) - used to denote a footnote, bullet point, or emphasis
• • (hyphen) - used to connect words or indicate a range
• — (em dash) - used to indicate a break in thought or emphasis
• " " (quotation marks) - used to indicate direct speech or quotations
• ' ' (single quotes) - used to indicate quotations within quotations or emphasize specific words
• ( ) (parentheses) - used to provide additional or clarifying information
• [ ] (brackets) - used to enclose explanatory or editorial comments
• { } (braces) - used to group related items or indicate optional elements
• | (pipe) - used to separate or organize information
• \ (backslash) - used to indicate a continuation or escape character
• / (forward slash) - used to separate or indicate alternatives
• ~ (tilde) - used to indicate approximation or similarity
• ` (backtick) - used to indicate inline code or formatting
• • (plus sign) - used to indicate addition or positivity
• = (equal sign) - used to indicate equality or equivalence
• < > (less than/greater than) - used to indicate comparisons or hierarchies
• _ (underscore) - used to indicate emphasis or connect words
• ... (ellipsis) - used to indicate a pause, omission, or trailing off

Again, it's important to use these characters judiciously and in appropriate contexts to avoid confusing or overwhelming the recipient.