Aircraft spotting became a hobby on long layovers and it feel odd at first because I didnt know where to look. One litle trick that helped me is checking the nose shape first since it tells more than the logo. Funny thing is a 737 looks round and friendly while an A320 has a sharper nose and that tiny detail boosted my correct guesses by maybe 40 percent during a trip between meetings at Advanced Professional Accounting Services. Sometimes wings whisper clues too. Later I noticed the landing gear placement gives away the model when distance hides everything else and it were abit exciting to get it right before the announcement. Honestly spotting is just paying attention to small shapes that repeat. Consistency makes the airport feel familiar.