I'm 31, and I've been playing D&D in all its forms since I was 8 years old (with my big brother as the DM at the time)
I've played in
1e AD&D- Dwarf Fighter 1 - 15th; Ranger/DC MU 1 - 8th / 1 - 7th; Gnome Illusionist 1 - 5th; Cavalier 1 - 6th; Human Fighter 1 - 12th
2e AD&D- Human Thief 1 - 8th, Human Dragonslayer Paladin 1 - 7th, Cleric 1 - 6th, Fighter/MU 1 - 5th / 1 - 5th; Wild Mage 1 - 9th (that one was
fun)
3.5e- Dwarf Monk 14 - 24th (became a deity so I retired him to play...) Undead Slayer Ranger variant 10 - 24th (campaign ended there); Pixie Warlock 1 - 12th (retired cuz he had 34 children to play...) Human Egoist 1 - 20th (took the Uncarnate PrC); Warforged Cleric 1 - 44th (retired due to roleplying him becoming a font of magic, to play...) Human Druid/Wizard/Arcane Hierophant 20 - 46th; Human Warblade 1 - 5th; Gnome Illusionist/Shadowcrafter/Shadowcraft Mage 24 - 27th (retired him cuz he was broken as hell to play...) Half-Dragon Goliath Fighter 24 - 30th who used a large great flail he custom built himself that had his cohort attached to it, Half-Dragon Dwarf Barbarian/Frenzied Berserker dressed in adamantine full plate and 2 spiked gauntlets; yes he was the head of my great flail

super fun character
4e- Goliath Barbarian 26 - 30th, achieved epic destiny; Dwarf Cleric 1 - 14th; Dragonborn Sorcerer 3 - 22nd; Deva Cleric 18 - 30th achieved epic destiny
Now, that's about it for my play experiences because in-between all of those games, as well as for the last 4 years, all I've done is DM. I've run many campaigns from low to high level, but only one of them was a 2e AD&D game, the rest were all 3.5e rules. I haven't tried to run a 4e game because I can't seem to find interest for the ruleset when 3.5e ruleset is available as an option. I have never had trouble running an epic campaign; it requires patience and a lot of planning and work on the DM's part. If you aren't willing to spend about 10 to 12 hours of work before each game session, then your sessions will be short and/or your players will be bored (too powerful) or bored/unhappy (you TPK'd them) or uninterested (lack of story/background/plot) You have to put in the time for the campaign to be good, it won't just magically poof into being infront of you.