SNG's vs cash games - advice sought (long)

[45suited]

I've been playing SNG's for about a year with good success. I'm about to move up to the 22s exclusively, but recently I've gotten kind of burned out / bored with the grind of the SNGs. So I started playing NL25. These games are so soft that my $ / hr (over a small sample size) has actually been higher than my SNG $ / hr. Again, the NL25 sample size is small so I'm not putting much stock into the actual rate. Here is my question, keeping in mind that I just started playing poker 1 year ago. I want to keep improving as an all-around poker player, but I also don't want this to hurt my $ /hr too drastically.

Given the vastly different considerations between SNGs and cash games, can I (as a non-genius but a player killing the lower levels) effectively play both SNGs and cash games OR will playing the cash games hurt my SNG play by getting me out of that mindset?

Will playing cash games help my SNG play in any way (post flop play perhaps) or will it hurt it? Has anybody run into problems by trying to play alot of both?

(I bring this up because there was just a thread in the other forum where a guy had QQ and faced a mini re-raise pre-flop. An ace flopped, queen came on the turn, and most of the guys on that forum didn't want to raise the river. I was like, "I play SNG's! Push it! Don't worry about set over set!" but I was in the minority.)

It got me to thinking that trying to get good at both games might just hurt me in the short run.

Comments / flames would be appreciated.