I like tapatalk when uploading images. It's much simpler. I like desktop version for signatures and it's also a lot easier to see who is 'talking'. I don't really look at too many names. I know who posts based on profile pic.
Another thing. I don't know if I set it up or if it's automatic but I get a notification on my phone whenever anyone quotes me. I find that really helpful because almost always when I ask a question, the one who answers will quote me. Very useful feature.
Also on tapatalk you can't see how many posts a user has unless you 'stalk' STS.