Aye. I tend to make new characters pretty soon. I recently removed all my many characters and started two new ones which I intend to be my main characters which I will play them until everything I can think of is done (except joining all guilds - my personal rule is to join only one per character, max two)
ya im pretty much the same way and i dont play any jack-of-all-trade type characters, so my characters tend to max or near max out around lvl 30-40 i have yet to take any character passed lvl 47. i dont delete all my saves tho ill just make a "retirement" save for that character usually inside whatever house they own, then delete all other save's associated with them. currently i have 4 retired characters and 1 active, she's only been in skyrim about 6 months game time