I used the free D&D Basic Rules and went with a simple human fighter, Aeven Steelhand. When my Player's Handbook arrived, I opted to make him a Champion when he hit third level. This meant that Aeven had no spells and not much for specialized skills. He is the toughest frontline fighter in the group, but I found him lacking grit and punch compared to his peers who benefited from spells and special features. This was particularly noticeable when he went down quickly in battles with goblins and zombies. It should be said that our DM was rolling 20s in Roll20 (as if he had hacked the system).
I expected to be limited in my options, but I didn't expect to be so vulnerable.The fighter can wear heavier armor, but doesn't typically have the means to buy when starting out. While it was nice to get the improved critical as a Champion, I found that it didn't noticeably impact play. When playing AD&D 1e years ago and Castles & Crusades a few years back, we gave fighters a d12 for hit points. With Castles & Crusades, this hit point enhancement worked well as we were not using the barbarian class.
None of this changes my overall positive opinion of D&D 5e. I am looking forward to running my first session next Monday night.