I'm choosing 'r' because it's one of the most common consonants in English words. With a 6-letter word that has 'e' as the third letter, there's a decent chance 'r' appears in the word. Common patterns include words ending with 'er', or words with 'r' before the 'e'. Additionally, with 3 wrong guesses already used out of 6 allowed, I need to make high-probability guesses.