I feel the complete opposite.
I always found playing casters boring which is why I usually go melee. If playing a nuker - you pick your handful of best spells that you use the vast majority of the time, put them on a hotbar and mash away. Position doesn't matter much. Playing a shirardi sorc is about as boring as it gets - mash 3 magic missle spells...repeat x 1,000,000.
Now playing a DC caster/CC caster is different, I'd agree with you there. I have a DC wizard which I enjoy a lot.
As a melee there's lots to consider. Your positioning so you fully take advantage of cleaves. Then there's finishing moves, tactics, ED abilities and the art of twitching. Also jumping/dodging matters a lot more since you're always up in the mobs faces. Generally you take much more damage so you have to pay attention to your defense and healthbar a lot more - and unless you're a bladeforged true melees don't have a "fill up my hp bar now" button so that's another reason you have to pay more attention to your healthbar.