It’s about speed
The TT is about speed. So I don’t recommend Quarter Bridge (Douglas), Ballacraine (St John’s), Parliament Square and the Hairpin (Ramsey), Signpost (Onchan) and Governor’s (Douglas again). Braddan Bridge (Braddan) is fairly slow too, but the vista and seating make up for it. Likewise the slowish Gooseneck (above Ramsey), has tons of atmosphere. Windy Corner is fast, and fun to reach on a trail bike. But it’s so smooth and open it’s more like a normal racetrack.