Is it bad to only like DPS?

[Chiramu]

In that regard, I think it's only natural to like DPS more because it's really the easiest class to play by comparison.

Tanking is actually the easiest role to play in FFXIV. DPS need to make sure their rotations are spot on to maximise their output. DPS is much more stressful(and rewarding) in FFXIV then healing and tanking. People rarely look at healing metres, but they constantly make sure you are min-maxing your DPS.