"CE and CH may not dislike TH per se, but it must get annoying to be around someone who is hyper energetic like Tom". I agree with this. CE and CH are very laid back, unpretentious guys so they don't really match, personality-wise, with Tom. And you can see the interaction between Tom and CE at the MTV awards. CE is uncomfortable, lots of hugging from Tom, and CE and SLJ hung out together backstage w/o Tom (I'm guessing bc SLJ is also a laid back kind of guy, they get along better).