I'm something of an aficionado...

Meaning

I'm a serious enthusiast or connoisseur of something.

Examples

• John: I hear you've been to several wine tastings lately.
• Alice: That’s right. <b>I'm something of an aficionado</b> when it comes to fine wines.
• John: Wow, impressive! Do you have a favorite type of wine?
• Alice: Indeed! <b>I'm something of an aficionado</b>, especially with Bordeaux wines.