Simply put I enjoy the mid levels' up to about 10 the most. Basically because they allow me to create the character and then role play them upm tp that power level. Then I can have a history behind the character, their items (remember when we fought that ettin and got your sword out of his hoard?) and with the other party members.
What I've found is that characters of higher level tend to get roled up starting at higher levels. This leads to characters that are just a stat block, or items that have no back story.
Don't get me worng, I love a grand hack and slash with maxed out characters as much as the next guy. But I love a well developed character that has a histroy and story behind him even more.
My other probelm is when characters start getting over 10th level the amount of magic they're lugging around can get pretty silly real fast. I've played in one that was well DM'd and we had characters in the 10-15 level range and had folks that had three powerful magic swords. The wizard had a wand for every occasion, etc. etc.
So 6-10 level for me. Hmm, guess that wasn't so short after all.
Apologies.
Ahsrum